CBLT-237:  also make the version dir in maven

Change-Id: I9dd4a58df9a00de26db7167548be21b62dedcfd0
Reviewed-on: http://review.couchbase.org/34975
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>