Store self serve replication API destination input as uppercase (#260)

## Summary

<!--- HINT: Replace #nnn with corresponding Issue number, if you are
fixing an existing issue -->
This PR saves the destination input for the self serve replication API
as uppercase in the server side to maintain consistency across inputs.
The API still accepts both lower/upper case inputs, but the server
processes it as uppercase.

## Changes

- [ ] Client-facing API Changes
- [ ] Internal API Changes
- [ ] Bug Fixes
- [ ] New Features
- [ ] Performance Improvements
- [ ] Code Style
- [x] Refactoring
- [ ] Documentation
- [ ] Tests

For all the boxes checked, please include additional details of the
changes made in this pull request.

## Testing Done
<!--- Check any relevant boxes with "x" -->

- [x] Manually Tested on local docker setup. Please include commands
ran, and their output.
- [ ] Added new tests for the changes made.
- [x] Updated existing tests to reflect the changes made.
- [ ] No tests added or updated. Please explain why. If unsure, please
feel free to ask for help.
- [ ] Some other form of testing like staging or soak time in
production. Please explain.

For all the boxes checked, include a detailed description of the testing
done for the changes made in this pull request.

Updated unit testing and tested on local docker:
```
spark.sql("alter table u_tableowner.tbl1 set policy (replication=({destination:'bb', interval:12H}))")
```
in table properties:
```
  "replication": {
    "config": [
      {
        "destination": "\u0027BB\u0027",
        "interval": "12H",
      }
    ]
```
```
spark.sql("alter table u_tableowner.tbl1 set policy (replication=({destination:'BB', interval:12H}))")
```
in table properties:
```
  "replication": {
    "config": [
      {
        "destination": "\u0027BB\u0027",
        "interval": "12H",
      }

```


# Additional Information

- [ ] Breaking Changes
- [ ] Deprecations
- [ ] Large PR broken into smaller PRs, and PR plan linked in the
description.

For all the boxes checked, include additional details of the changes
made in this pull request.

services/tables/src/main/java/com/linkedin/openhouse/tables/dto/mapper/iceberg/PoliciesSpecMapper.java

@@ -13,6 +13,7 @@
 import com.linkedin.openhouse.tables.utils.IntervalToCronConverter;
 import java.util.List;
 import java.util.stream.Collectors;
+import org.apache.commons.lang3.StringUtils;
 import org.mapstruct.Mapper;
 import org.mapstruct.Named;
 
@@ -119,24 +120,25 @@ private Replication mapReplicationPolicies(Replication replicationPolicy) {
           replicationPolicy.getConfig().stream()
               .map(
                   replication -> {
-                    if (replication.getInterval() == null || replication.getInterval().isEmpty()) {
-                      return replication
-                          .toBuilder()
-                          .interval(ReplicationInterval.DEFAULT.getInterval())
-                          .cronSchedule(
-                              IntervalToCronConverter.generateCronExpression(
-                                  ReplicationInterval.DEFAULT.getInterval()))
-                          .build();
+                    if (replication == null || StringUtils.isEmpty(replication.getDestination())) {
+                      return null;
                     }
-                    if (replication.getCronSchedule() == null) {
-                      return replication
-                          .toBuilder()
-                          .cronSchedule(
-                              IntervalToCronConverter.generateCronExpression(
-                                  replication.getInterval()))
-                          .build();
+                    String destination = replication.getDestination().toUpperCase();
+                    String interval = replication.getInterval();
+                    String cronSchedule = replication.getCronSchedule();
+
+                    if (StringUtils.isEmpty(interval)) {
+                      interval = ReplicationInterval.DEFAULT.getInterval();
+                    }
+                    if (StringUtils.isEmpty(cronSchedule)) {
+                      cronSchedule = IntervalToCronConverter.generateCronExpression(interval);
                     }
-                    return replication;
+                    return replication
+                        .toBuilder()
+                        .destination(destination)
+                        .interval(interval)
+                        .cronSchedule(cronSchedule)
+                        .build();
                   })
               .collect(Collectors.toList());
       return replicationPolicy.toBuilder().config(replicationConfig).build();

services/tables/src/test/java/com/linkedin/openhouse/tables/e2e/h2/TablesControllerTest.java

@@ -1057,7 +1057,7 @@ public void testUpdateSucceedsForReplicationConfig() throws Exception {
         JsonPath.read(
             mvcResult.getResponse().getContentAsString(), "$.policies.replication.config[0]");
 
-    Assertions.assertEquals(updatedReplication.get("destination"), "clusterA");
+    Assertions.assertEquals(updatedReplication.get("destination"), "CLUSTERA");
     Assertions.assertEquals(updatedReplication.get("interval"), "12H");
     Assertions.assertTrue(
         RequestAndValidateHelper.validateCronSchedule(updatedReplication.get("cronSchedule")));
@@ -1128,7 +1128,7 @@ public void testUpdateSucceedsForReplicationAndRetention() throws Exception {
         JsonPath.read(
             mvcResult.getResponse().getContentAsString(), "$.policies.replication.config[0]");
 
-    Assertions.assertEquals(updatedReplication.get("destination"), "clusterA");
+    Assertions.assertEquals(updatedReplication.get("destination"), "CLUSTERA");
     Assertions.assertEquals(updatedReplication.get("interval"), "1D");
     Assertions.assertTrue(
         RequestAndValidateHelper.validateCronSchedule(updatedReplication.get("cronSchedule")));
@@ -1178,15 +1178,15 @@ public void testUpdateSucceedsForMultipleReplicationConfig() throws Exception {
         JsonPath.read(
             mvcResult.getResponse().getContentAsString(), "$.policies.replication.config[0]");
 
-    Assertions.assertEquals(updatedReplication.get("destination"), "clusterA");
+    Assertions.assertEquals(updatedReplication.get("destination"), "CLUSTERA");
     Assertions.assertEquals(updatedReplication.get("interval"), "1D");
     Assertions.assertTrue(
         RequestAndValidateHelper.validateCronSchedule(updatedReplication.get("cronSchedule")));
     updatedReplication =
         JsonPath.read(
             mvcResult.getResponse().getContentAsString(), "$.policies.replication.config[1]");
 
-    Assertions.assertEquals(updatedReplication.get("destination"), "clusterB");
+    Assertions.assertEquals(updatedReplication.get("destination"), "CLUSTERB");
     Assertions.assertEquals(updatedReplication.get("interval"), "12H");
     Assertions.assertTrue(
         RequestAndValidateHelper.validateCronSchedule(updatedReplication.get("cronSchedule")));

services/tables/src/test/java/com/linkedin/openhouse/tables/model/TableModelConstants.java

@@ -62,7 +62,7 @@ public final class TableModelConstants {
     RETENTION_POLICY =
         Retention.builder().count(3).granularity(TimePartitionSpec.Granularity.HOUR).build();
     ArrayList<ReplicationConfig> configs = new ArrayList<>();
-    configs.add(ReplicationConfig.builder().destination("cluster1").interval("12H").build());
+    configs.add(ReplicationConfig.builder().destination("CLUSTER1").interval("12H").build());
     REPLICATION_POLICY = Replication.builder().config(configs).build();
 
     RETENTION_POLICY_WITH_PATTERN =