##### SUMMARY
gitlab_group contains call to Display.deprecated or AnsibleModule.deprecate and is scheduled for removal

```
lib/ansible/modules/source_control/gitlab_group.py:273:4: ansible-deprecated-version: Deprecated version ('2.10') found in call to Display.deprecated or AnsibleModule.deprecate
```

##### ISSUE TYPE
 - Bug Report

##### COMPONENT NAME
```
lib/ansible/modules/source_control/gitlab_group.py
```

##### ANSIBLE VERSION
```
2.10
```

##### CONFIGURATION
N/A

##### OS / ENVIRONMENT
N/A

##### STEPS TO REPRODUCE
N/A

##### EXPECTED RESULTS
N/A

##### ACTUAL RESULTS
N/A

group = self.groupObject
        if len(group.projects.list()) >= 1:
            self._module.fail_json(
                msg="There are still projects in this group. These needs to be moved or deleted before this group can be removed.")
        else:
            if self._module.check_mode:
                return True
            try:
                group.delete()
            except Exception as e:
                self._module.fail_json(msg="Failed to delete group: %s " % to_native(e))
    '''
    @param name Name of the groupe
    @param full_path Complete path of the Group including parent group path. <parent_path>/<group_path>
    '''
    def existsGroup(self, project_identifier):
        
        group = findGroup(self._gitlab, project_identifier)
        if group:
            self.groupObject = group
            return True
        return False
def deprecation_warning(module):
    deprecated_aliases = ['login_token']
    for aliase in deprecated_aliases:
        if aliase in module.params:
            module.deprecate("Alias \'{aliase}\' is deprecated".format(aliase=aliase), "2.10")
def main():
    argument_spec = basic_auth_argument_spec()
    argument_spec.update(dict(