Merge "Check the existence of raft dir." into nyc-mr1-dev am: bcd82a3859
am: 5f88e4b387

* commit '5f88e4b387f2663a0e24044c20db9a8448bf3f13':
  Check the existence of raft dir.

Change-Id: Ic888d34e1fa5ff6002fe2cd64160fea1f0a290d6