Bug-1828 - Raft apply state missing index log should be of type warn and not error

Change-Id: Iede5050f337fc89e41d5f72c373ace0c2fcce540
Signed-off-by: Kamal Rameshan <kramesha@cisco.com>
Merge "Bug-1828 - Raft apply state missing index log should be of type warn and not error"