Remove unused private field in HTTP cookie

Change-Id: Ia13ce32712f49f4e4fdf9878e076279622cfd7da
cas.cc should be inside namespace

Change-Id: I7e319efda4211da8d8ed6d21d6e2e66cc791d214
couchbase_impl. test1

Change-Id: I20ff6d3ce6b0d13fca81d5191d6604f754c8253c