Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Noded didn't release the job queue lock after initialising it. This
patch makes sure to unlock once the work is done.

Reviewed-by: ultrotter

This way we can do locking when both noded and masterd are running
on the same machine, the latter holding an exclusive lock on the
queue.

Reviewed-by: iustinp

This will be used to move common code out of jqueue.

Reviewed-by: iustinp