@ApiModelProperty(name = ClusterResourceProvider.PROVISIONING_STATE)
  public String getProvisioningState(){
    return provisioningState;
  }
Gets whether the cluster is still initializing or has finished with its
deployment requests.

@return either {@code INIT} or {@code INSTALLED} or {@code null} if not set
        on the request.
ambari-server/src/main/java/org/apache/ambari/server/controller/ClusterRequest.java