* migrate IdentityRoleService implementation
* update unit tests
* move interfaces to the origin
* move models to proper places
* migrate model to interface
* fix test
* update docs
* [ADF-4738] [Process -Cloud] Move GroupCloudService to adf-core lib.
* * Changed GroupModel to IdentityGroupModel
* Updated unit tests the recent changes.
* * Added documentation to the identityGroupService
* Updated GroupInitial and GroupCoudcomponent doc.
* * Created groupCount model. * Updated unit test to the recent changes
* * After rebase updated doc
* * Fixed comments.