t: cover kvs transaction stats

Problem: There is no coverage for the new KVS transaction stats.

Add coverage in t1001-kvs-internals.t.

t/t1001-kvs-internals.t

@@ -534,6 +534,25 @@ test_expect_success 'kvs: 1 pending requests at end of tests before module remov
 	test $pendingcount1 -eq 1
 '
 
+#
+# transaction module stats
+#
+
+test_expect_success 'kvs: module stats returns reasonable transaction stats' '
+	commitdata=$(flux module stats -p transactions.commit kvs) &&
+        echo $commitdata | jq -e '.count > 0' &&
+        echo $commitdata | jq -e '.min > 0' &&
+        echo $commitdata | jq -e '.max > 0' &&
+	echo $commitdata | jq -e '.mean > 0.0' &&
+	echo $commitdata | jq -e '.stddev > 0.0' &&
+	fencedata=$(flux module stats -p transactions.fence kvs) &&
+        echo $fencedata | jq -e '.count > 0' &&
+        echo $fencedata | jq -e '.min > 0' &&
+        echo $fencedata | jq -e '.max > 0' &&
+	echo $fencedata | jq -e '.mean > 0.0' &&
+	echo $fencedata | jq -e '.stddev > 0.0'
+'
+
 #
 # test ENOSYS on unfinished requests when unloading the KVS module
 #