JCBC-492: Add support for getAndLock & getAndTouch.

Change-Id: Ic1563555808084f69506ba87abbbe226b0edbd84
Reviewed-on: http://review.couchbase.org/39412
Reviewed-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>