[Openais] change definition of sync_init api

[Steven Dake]

Currently we rely on confchg_fn calls into the coroapi to determine the
membership change.  This is unsafe for a variety of reasons.  This patch
changes the sync_init coroapi function so that it takes the member list,
size, and ring id.  From this information a proper synchronization
decision can be made.

Patches for corosync and openais included.

Regards
-steve


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