CBQE-1531: add tuq index tests

Change-Id: I088410e5a85a7fbcd7e4d0d7da1312740a683ba3
Reviewed-on: http://review.couchbase.org/29389
Reviewed-by: Ketaki Gangal <ketakigangal@gmail.com>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>