Add new permission class for the user account owner

itacloud-2586
Add tests for the user account

itacloud-2586
Add password field, the ability to change password

itacloud-2586
Merge branch 'develop' into feature/itacloud-2586
Add serializer for the password field

itacloud-2586
Add documentation and tests for password serializer

itacloud-2586
Extend User serializer

- ITACLOUD-2586
Refactor User tests resolvers

- moved to factory
Extend user update documentation
Merge branch 'feature/itacloud-2586' into 'develop'

Feature/itacloud 2586