Missing literal, a unique string value, is used.

Change-Id: I5f85a5a1763e3ea78da399bbe60e5d5b48a61da5
Reviewed-on: http://review.couchbase.org/42515
Reviewed-by: John Liang <johliang00@gmail.com>
Reviewed-by: Pratap Chakravarthy <prataprc@couchbase.com>
Tested-by: Pratap Chakravarthy <prataprc@couchbase.com>