Don't exit in case connection establishment fails

This would prevent client to stop working if agent restarts in
middle of connection initiation. If entity creation fails the
client stop connecting and waiting for next ping response
from agent before next connection attempt.

src/modules/microdds_client/microdds_client.cpp

@@ -194,7 +194,7 @@ void MicroddsClient::run()
 
 		if (!uxr_create_session(&session)) {
 			PX4_ERR("uxr_create_session failed");
-			return;
+			continue;
 		}
 
 
@@ -221,17 +221,17 @@ void MicroddsClient::run()
 
 		if (!uxr_run_session_until_all_status(&session, 1000, &participant_req, &request_status, 1)) {
 			PX4_ERR("create entities failed: participant: %i", request_status);
-			return;
+			continue;
 		}
 
 		if (!_subs->init(&session, reliable_out, participant_id)) {
 			PX4_ERR("subs init failed");
-			return;
+			continue;
 		}
 
 		if (!_pubs->init(&session, reliable_out, input_stream, participant_id)) {
 			PX4_ERR("pubs init failed");
-			return;
+			continue;
 		}
 
 		_connected = true;