chore: add connectionClosedExplicitly message to logs

Author: sophia-bq

wrapper/src/main/java/software/amazon/jdbc/plugin/failover2/FailoverConnectionPlugin.java

@@ -613,7 +613,7 @@ protected void invalidateCurrentConnection() {
 
   protected void pickNewConnection() throws SQLException {
     if (this.isClosed && this.closedExplicitly) {
-      LOGGER.fine(() -> Messages.get("Failover.transactionResolutionUnknownError"));
+      LOGGER.fine(() -> Messages.get("Failover.connectionClosedExplicitly"));
       return;
     }
 

wrapper/src/main/resources/aws_advanced_jdbc_wrapper_messages.properties

@@ -170,6 +170,7 @@ ExecutionTimeConnectionPlugin.executionTime=Executed {0} in {1} nanos.
 
 # Failover Connection Plugin
 Failover.transactionResolutionUnknownError=Transaction resolution unknown. Please re-configure session state if required and try restarting the transaction.
+Failover.connectionClosedExplicitly=Unable to failover, the connection has been explicitly closed.
 Failover.connectionChangedError=The active SQL connection has changed due to a connection failure. Please re-configure session state if required.
 Failover.exceptionConnectingToWriter=An exception occurred while trying to connect to the new writer ''{0}''.
 Failover.failoverReaderTimeout=The reader failover process was not able to establish a connection before timing out.