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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

import traceback
GITLAB_IMP_ERR = None
try:
    import gitlab
    HAS_GITLAB_PACKAGE = True
except Exception:
    GITLAB_IMP_ERR = traceback.format_exc()
    HAS_GITLAB_PACKAGE = False
from ansible.module_utils.api import basic_auth_argument_spec
from ansible.module_utils.basic import AnsibleModule, missing_required_lib
from ansible.module_utils._text import to_native
from ansible.module_utils.gitlab import findGroup
class GitLabGroup(object):
    def __init__(self, module, gitlab_instance):
        self._module = module
        self._gitlab = gitlab_instance
        self.groupObject = None
    '''
    @param group Group object
    '''
    def getGroupId(self, group):
        if group is not None:
            return group.id
        return None
    '''
    @param name Name of the group
    @param parent Parent group full path
    @param options Group options
    '''
    def createOrUpdateGroup(self, name, parent, options):