CLOUD-30 added stack state diagram
Merge pull request #388 from sequenceiq/cluster_state_diag

CLOUD-30 added stack state diagram
CLOUD-341 update to Ambari 1.7.0
CLOUD-341 update ambari rest client to 1.7.18
CLOUD-306 separate directory for the datanodes and nodemanager
CLOUD-362 service component restart organization
CLOUD-306 GCP default image removed