fix: Multiple instances of Thunder Broker created during Ripple boots…

…trap (#693)

* fix: Multiple instances of Thunder Broker created during Ripple bootstrap.
* fix: Addressed the review comment to compare the endpoint protocol field instead of key.

core/main/src/broker/endpoint_broker.rs

@@ -458,6 +458,10 @@ impl EndpointBrokerState {
 
     pub fn build_other_endpoints(&mut self, session: Option<AccountSession>) {
         for (key, endpoint) in self.rule_engine.rules.endpoints.clone() {
+            // skip thunder endpoint as it is already built using build_thunder_endpoint
+            if let RuleEndpointProtocol::Thunder = endpoint.protocol {
+                continue;
+            }
             let request = BrokerConnectRequest::new_with_sesssion(
                 key,
                 endpoint.clone(),