AS-5201: Include topic name in required exception

[Rutuja-IBM]

https://datastax.jira.com/browse/AS-5201

[Rutuja-IBM]

As discussed in this PR: #198
I’ve implemented the changes to handle the exception as requested by the client and refined the code for better clarity.

com.datastax.oss.pulsar.jms.Utils.handleException(Utils.java:74) com.datastax.oss.pulsar.jms.PulsarConnectionFactory.getProducerForDestination(...) com.datastax.oss.pulsar.jms.PulsarSession.getProducerForDestination(PulsarSession.java:265)

The getProducerForDestination method is the appropriate place to include the topic name in the exception message.

Changes made:

• Added topic name enrichment to exception handling where applicable.
• Introduced an overloaded method to safely handle cases where the topic may be null.
• Removed unrelated/unnecessary changes to keep the commit focused on this specific fix.

Do you have any other suggestions for this enrichment "[topic=" + topic + "]") ?
for ex: [topic=persistent://tenant/namespace/my-topic] it should find this regex

if (topic == null || (jms.getMessage() != null && jms.getMessage().contains("[topic=" + topic + "]"))) {
  return jms;
}