s3: SMB2 : Fix leak of blocking lock records in the database.

s3: SMB2 : Fix leak of blocking lock records in the database.

Based on a fix from Hemanth Thummala <hemanth.thummala@gmail.com>
Bug #10673 - Increasing response times for byte range unlock requests.

The previous refactoring makes it obvious we need to call
remove_pending_lock() in all places where we are returning
from the SMB2 blocking lock call.

https://bugzilla.samba.org/show_bug.cgi?id=10673

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ira Cooper <ira@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Mon Jun 30 14:59:16 CEST 2014 on sn-devel-104

(cherry picked from commit cee1531e551e5ccd5ccd4a55de226ad686919486)