CLOUDIFY-2160 added error messages
CLOUDIFY-2171 - NPEs in this test Ec2PersistencyOnManagerDownTest if the instance's GSC was not discovered (i.e. is null).
Build version advanced to 5987-319
Build version advanced to 5987-320
Build version advanced to 5987-321
Build version advanced to 5987-326
Build version advanced to 5987-325
Build version advanced to 5987-327
Build version advanced to 5987-328
Build version advanced to 5987-331
CLOUDIFY-2164 rearranged validations.
CLOUDIFY-2164 Added missing validations and tests.
CLOUDIFY-2164
CLOUDIFY-2164 fixed conflicts after rebase
CLOUDIFY-2164 deleted redundant class