ib/cm: fix handling of REJ in REQ_RCVD state

ib/cm: fix handling of REJ in REQ_RCVD state

If a REJ is received immediately after receiving a REQ,
then a callback can be queued to the user for the REJ before
the user has had a chance to see or process the REQ.  The
result is that the user will not have had a chance to set
any context associated with the REQ, which can lead to a
crash processing the REJ.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
git-svn-id: svn://openib.tc.cornell.edu/gen1@2661 ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86