CBLT-170:  set LITESERV_VERSION in mobile functional tests

Change-Id: I35aec8385684a40b25eea2eaa50ae56b09309895
Reviewed-on: http://review.couchbase.org/35716
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>