To avoid races, SQLTable::__setitem__ needs an exclusive lock for the
entire transaction, not just the INSERT/UPDATE part.
(Bitbake rev: feb43e7c30f5bfab75d718896c45df621810d06f)
Signed-off-by: Chris Laplante <chris.laplante@agilent.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>