Update embedded libcouchbase to 2.2.0.

Change-Id: I35fbfa9eaa2d637d6990ed647bbbbd8441216110
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Change-Id: Ie4ccddbe167bc444c1c4cd59dac4703cc934c5d5
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Change-Id: I47077fc09bf64c20aeab103b672e1d69e88b635f
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Change-Id: I56d34b0b83c9523aad5782cc6a92f15b34ea77fe
Fixed bug in http code.

Change-Id: I3d7b3c4c7294eab9c0dfbb22cc65f77e235e5f74