Issue 2901 in mobicents: ACK creation should not depend on a transaction

[mobicents]

Status: New
Owner: ----
Labels: Type-Defect Priority-Medium MSS-1.7.0.FINAL Release-Type-FINAL  
Roadmap-Fix Component-Sip-Servlets

New issue 2901 by vladimir...@gmail.com: ACK creation should not depend on  
a transaction
http://code.google.com/p/mobicents/issues/detail?id=2901

Linked to Issue 2886 where a null transaction reached response.createAck().  
This is just a safeguard feature.