Sent wrong message to clear a call we started if the other end has not responed yet.

Sent wrong message to clear a call we started if the other end has not responed yet.

In the state MISDN_CALLING (i.e. SETUP was sent but no answer has arrived yet),
it is not allowed to clear the call with RELEASE_COMPLETE.  It must be
cleared with DISCONNECT.  A RELEASE_COMPLETE is only allowed as an answer
to a SETUP.  (See Q.931 ch. 5.3.2, 5.3.2.a, 5.3.2.b)

Patches:
    chan-misdn-ccstate7.patch uploaded by customer.

JIRA ABE-1862

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@193613 65c4cc65-6c06-0410-ace0-fbb531ad65f3