Update embedded libcouchbase to 2.2.0.

Change-Id: I35fbfa9eaa2d637d6990ed647bbbbd8441216110
Fixed bug in http code.

Change-Id: I3d7b3c4c7294eab9c0dfbb22cc65f77e235e5f74
Test

Change-Id: Ic7e698829c30334915c92156acf8417a181ed6cb