CBQE-1554 fix cli test for hash command

Change-Id: Idae1eb92307443e5d71ad5d7dce13899f0619286
Reviewed-on: http://review.couchbase.org/29196
Reviewed-by: Ketaki Gangal <ketakigangal@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>