When a connection is acquired from the pool the session handle is not directly available so grab it from the main handle instead.
When a connection is acquired from the pool the session handle is not directly
available so grab it from the main handle instead.


git-svn-id: b746c3c07d6b14fe725b72f068c7252a81557b48@221 0cf6dada-cf32-0410-b4fe-d86b42e8394d

Bluehorn/cx_Oracle,Bluehorn/cx_Oracle,Bluehorn/cx_Oracle