CLOUD-275 delete stack even if AWS resources are not found in the cloud
Merge pull request #330 from sequenceiq/delete-check

LGTM
CLOUD-140 check azure credential before provisioning
CLOUD-140 stack not creating in the db when is not prepared
CLOUD-140 more detailed message when something wrong with the stack preparation
Merge pull request #331 from sequenceiq/azure-fix-cred

CLOUD-140 check azure credential before provisioning
CLOUD-106 add missing stack id field to cloudbreak usage json entity
Merge pull request #332 from sequenceiq/events

CLOUD-106 add missing stack id field to cloudbreak usage json entity
CLOUD-275 support c type instances
Merge pull request #333 from sequenceiq/aws-instance-types

LGTM
CLOUD-287 send decommissioning requests all together to make it faster
Merge pull request #335 from sequenceiq/decommission

CLOUD-287 send decommissioning requests all together to make it faster
CLOUD-287 decommission hbase region server as well
Merge pull request #338 from sequenceiq/hbase

LGTM
CLOUD-288 faulty error message fixed
CLOUD-289 base64 encoded p12 files in db
Merge pull request #339 from sequenceiq/errormsg

CLOUD-288 faulty error message fixed
CLOUD-274 check ambari status
Merge pull request #340 from sequenceiq/ambari-update

CLOUD-274 check ambari status
CLOUD-289 do not return private key file + delete temp p12 files