Hi Avinash,
I see your ticket in the support database. It's already a Severity 2 and can't go any higher. I don't work in support, but I can draw their attention to this posting and hopefully get you an update.
In the meantime, please see if this link helps:
What TLS cipherspecs/ciphersuites are supported when connecting from Oracle Java (non-IBM JRE) to MQ queue manager? - I…
DevTest, by default, uses the Oracle JVM which seems to have disabled certain cipher suites for security reasons. The article seems to recommend either 1) configure DevTest to use the IBM JVM, or 2) adjust the runtime settings of the Oracle JVM.
--Mike