Currently saLckResourceUnlockAsync leaves the lockid in the handle database even

Currently saLckResourceUnlockAsync leaves the lockid in the handle database even
when the lock has been unlocked. This can cause exec crashes if the lock is
unlocked twice.

This patch adds an extra field to the res_lib_lck_resourceunlockasync structure
so that the library can remove the lock from the handle database when the lock
is unlocked successfully, as well as code to do it, obviously.

git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@1383 fd59a12c-fef9-0310-b244-a6a79926bd2f