Release the lock

def release(self, owner, access):
        """ Release the lock """
        assert isinstance(access, LockAccess)

        debuglog("%s release(%s, %s)" % (self, owner, access.mode))
        if not self._removeOwner(owner, access):
            debuglog("%s already released" % self)
            return

        self._tryWakeUp()

        # notify any listeners
        self.release_subs.deliver()