Bug 8380: Fix unhandled messages in ShardManager
Added trace logging for RegisterRoleChangeListenerReply and other
MemberEvent (ie MemberJoined, MemberLeft).
The DeleteMessagesSuccess message was the result of deleting legacy
journal messages (SchemaContextModules) that were kept for backwards
compatibility with Helium. I removed the associated code and the
deprecated ShardManager class that was kept for the SchemaContextModules
inner class.
Also added logging for DeleteSnapshotsFailure and DeleteSnapshotsSuccess.
Change-Id: I145ea815b191f1e167e73029df348c7d15732c4f
Signed-off-by: Tom Pantelis <tompantelis@gmail.com>