CBQE-1531: add possibility to get tuq from git

Change-Id: I66611dd7a4a6f6aa5c8191bd8f7cb3b3c842968d
Reviewed-on: http://review.couchbase.org/29149
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>