Revert "s3: smbd: Tear down global_smbXsrv_client in the correct order."

Revert "s3: smbd: Tear down global_smbXsrv_client in the correct order."

Wrong fix for the problem that was actually fixed in the dbwrap_rbt
code with commits:

590507951fc514a679f44b8bfdd03c721189c3fa
0f46da08e160e6712e5282af14e1ec4012614fc7

This reverts commit 8024e19b70047865249305bceddd4473d6e60051.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Mon Dec  7 21:09:04 CET 2015 on sn-devel-104