Updated to libcouchbase-2.3.0.

Change-Id: I2ccc7b72b619f7c03da939a8ee99719c374eef31
Added support for asynchronous connect handling.

Change-Id: Id27a5550dd13a9350e5b4aa104c6dd6533b37d49
Added support for CCCP.

Change-Id: Iccff37e7291b3b3854374de6aca90728d7104c66
Added support for SRV records.

Change-Id: I63047270224fb71ff16c6986c0946a5e76de154d
WIP: MockServer integration.

Change-Id: Ic087de0ebb85dba4737e4557149dc92c7dd3d8f4