CLOUD-325 wait for data nodes to move their blocks when decommissioning
CLOUD-322 replication aware decommission
CLOUD-325 small variable fix
CLOUD-322 do not select the ambari server for decommission
CLOUD-322 increase safety percentage and validate remaning node size
CLOUD-322 DFS replication filter
CLOUD-322 use replication factor with 20% safety when calculating the remaining space
CLOUD-322 extends decommission process with logging
CLOUD-322 checkstyle fix
CLOUD-322 rearrange methods
Merge pull request #369 from sequenceiq/decom

LGTM