JCBC-249 : Observe tests added as per the test plan.

Change-Id: Ic0116620fbdf1944432a1b643cda250c0b397f7e
Reviewed-on: http://review.couchbase.org/24767
Tested-by: Deepti Dawar <deepti.dawar@globallogic.com>
Reviewed-by: Michael Nitschinger <michael.nitschinger@couchbase.com>