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##### SUMMARY
<!--- Explain the problem briefly below -->

`python-gitlab` library release a new version [v1.13.0](https://github.com/python-gitlab/python-gitlab/releases/tag/v1.13.0). User/Password authentication as been removed completely causing all Ansible GitLab module to fail... 

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->

gitlab_group
gitlab_deploy_key
gitlab_hook
gitlab_project
gitlab_project_variable
gitlab_runner
gitlab_user

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
All versions

changed = False
        for arg_key, arg_value in arguments.items():
            if arguments[arg_key] is not None:
                if isinstance(arguments[arg_key], list):
                    list1 = getattr(runner, arg_key)
                    list1.sort()
                    list2 = arguments[arg_key]
                    list2.sort()
                    if cmp(list1, list2):
                        setattr(runner, arg_key, arguments[arg_key])
                        changed = True
                else:
                    if getattr(runner, arg_key) != arguments[arg_key]:
                        setattr(runner, arg_key, arguments[arg_key])
                        changed = True
        return (changed, runner)
    '''
    @param description Description of the runner
    '''
    def findRunner(self, description):
        runners = self._gitlab.runners.list(as_list=False)
        for runner in runners:
            if (runner.description == description):
                return self._gitlab.runners.get(runner.id)
    '''
    @param description Description of the runner
    '''
    def existsRunner(self, description):