CBQE:0 Add 60s wait time before loading to check 404 error

Change-Id: Ie1f35868a2703cd06e1448674d4ab0b400545159
Reviewed-on: http://review.couchbase.org/39767
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Aruna Piravi <aruna@couchbase.com>
Tested-by: Aruna Piravi <aruna@couchbase.com>