NEW ISSUE: Allow topics anywhere that queues can be used

[Eric Johnson <eric@tibco.com>]

Target: JMS Binding specification

Description:
Lines 158 & 159 say that topics may not be used for a request/response 
MEP.  This restriction is arbitrary, and prevents some use-cases.

Line 310: defines the notion of scaCallbackQueue, but here again, there 
doesn't seem to be any particular reason to prevent the use of topics.

Proposal:
Allow topics to be used with request/response destinations, but 
highlight that SCA only supports this to the extent that the MEP still 
works as expected - for example, only one response is received, even if 
the original request message is sent to a topic destination.