CBQE-1550: tuq: add escaped identifiers

Change-Id: Id3dd943e7dd74384cf3177ecd8e78ffb73347749
Reviewed-on: http://review.couchbase.org/37713
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Ketaki Gangal <ketakigangal@gmail.com>