List resource groups associated with the subscription

def list_resource_groups(call=None):
    '''
    List resource groups associated with the subscription
    '''
    if call == 'action':
        raise SaltCloudSystemExit(
            'The list_hosted_services function must be called with '
            '-f or --function'
        )

    resconn = get_conn(client_type='resource')
    ret = {}
    try:
        groups = resconn.resource_groups.list()

        for group_obj in groups:
            group = group_obj.as_dict()
            ret[group['name']] = group
    except CloudError as exc:
        __utils__['azurearm.log_cloud_error']('resource', exc.message)
        ret = {'Error': exc.message}

    return ret