CLOUD-270 provide access for periscope with client_credentials, rest call to obtain stack id from ambari address
CLOUD-270 add access to periscope client to security endpoints
CLOUD-270 remove unused user entity from controllers
CLOUD-270 extend stack json with user and account realted fields
CLOUD-270 check for scope instead of client for autoscaling
Merge pull request #318 from sequenceiq/periscope

Periscope