Enable using the same ConnectionFactory for Multiple threads while posting JMS messages

@pmouawad ([Bug 53833](https://bz.apache.org/bugzilla//show_bug.cgi?id=53833&redirect=false)):
The Jmeter at present creates a new QueueConnection for each of the thread (as per the number of threads provided).

Usually when testing one application calling one broker, applications will pool Connection or share Connection using rather one Session per thread.

It would be useful to allow sharing Connection among threads + add an option to allow pooling connections.

See:
http://stackoverflow.com/questions/12280475/jmeter-use-the-same-connectionfactory-for-multiple-threads-while-posting-jms-me

Votes in Bugzilla: 3
OS: All

Duplicates:
* https://github.com/apache/jmeter/issues/4458