Add boilerplate and remove wildcard imports for openstack modules (#31461)

* Add boilerplate and remove wildcard imports for openstack modules
* Remove openstack files that are now pep8 compliant from the legacy list

lib/ansible/modules/cloud/openstack/os_client_config.py

@@ -46,8 +46,6 @@ EXAMPLES = '''
       - mordred
 '''
 
-from ansible.module_utils.basic import AnsibleModule
-
 try:
     import os_client_config
     from os_client_config import exceptions
@@ -55,6 +53,8 @@ try:
 except ImportError:
     HAS_OS_CLIENT_CONFIG = False
 
+from ansible.module_utils.basic import AnsibleModule
+
 
 def main():
     module = AnsibleModule(argument_spec=dict(