CLOUD-289 base64 encoded p12 files in db
CLOUD-289 do not return private key file + delete temp p12 files
Merge pull request #341 from sequenceiq/gcc-p12

LGTM
CLOUD-290 ambari client service introduced
CLOUD-290 stack does not peristed the ambari ip yet
CLOUD-290 do not decommission hosts with AMs
CLOUD-290 variables naming fix
Merge pull request #342 from sequenceiq/hostfilter

LGTM
CLOUD-290 NN and SNN filter
CLOUD-291 fixed resource saving between steps
Merge pull request #343 from sequenceiq/filter

LGTM
CLOUD-291 removed context update
CLOUD-291 fixed logger message
Merge pull request #344 from sequenceiq/save-fix

LGTM
CLOUD-292 resource name length much longer now
CLOUD-292 resource name length change
Merge pull request #345 from sequenceiq/resource-name-length

CLOUD-292 resource name length much longer now
CLOUD-31 validate SNS message signatures
CLOUD-31 use stringbuilder instead of + operator
Merge pull request #347 from sequenceiq/sns-verification

validate SNS message signatures