Adding maven plugin.

Change-Id: Id47c4d201e067807fdf87db8ec5b9af6236b95bd
Reviewed-on: http://review.couchbase.org/37267
Reviewed-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>