ipaserver_master_password: Fix documentation sections and agument spec

ansible-test with ansible-2.14 is adding a lot of new tests to ensure
that the documentation section and the agument spec is complete. Needed
changes:

DOCUMENTATION section

- `type: str` needs to be set for string parameters
- `required` tags need to be fixed according to the `argument_spec`
- `author` needs to be given with the github user also: `Name (@user)`

RETURN section

- `type: str` needs to be used for string parameters

argument_spec

- `type='str'` needs to be set for string parameters

supports_check_mode is turned off as it is not supported.

A call to ansible_ipa_server.check_imports has been added to check for import
errors.

The `copyright` date is extended with `-2022`.

roles/ipaserver/library/ipaserver_master_password.py

@@ -5,7 +5,7 @@
 #
 # Based on ipa-server-install code
 #
-# Copyright (C) 2017  Red Hat
+# Copyright (C) 2017-2022  Red Hat
 # see file 'COPYING' for use and warranty information
 #
 # This program is free software; you can redistribute it and/or modify
@@ -40,12 +40,14 @@ description:
 options:
   dm_password:
     description: Directory Manager password
-    required: no
+    type: str
+    required: yes
   master_password:
     description: kerberos master password (normally autogenerated)
-    required: yes
+    type: str
+    required: no
 author:
-    - Thomas Woerner
+    - Thomas Woerner (@t-woerner)
 '''
 
 EXAMPLES = '''
@@ -54,6 +56,7 @@ EXAMPLES = '''
 RETURN = '''
 password:
   description: The master password
+  type: str
   returned: always
 '''
 
@@ -61,6 +64,7 @@ import os
 
 from ansible.module_utils.basic import AnsibleModule
 from ansible.module_utils.ansible_ipa_server import (
+    check_imports,
     setup_logging, options, paths, read_cache, ipa_generate_password
 )
 
@@ -69,13 +73,14 @@ def main():
     module = AnsibleModule(
         argument_spec=dict(
             # basic
-            dm_password=dict(required=True, no_log=True),
+            dm_password=dict(required=True, type='str', no_log=True),
-            master_password=dict(required=False, no_log=True),
+            master_password=dict(required=False, type='str', no_log=True),
         ),
-        supports_check_mode=True,
+        supports_check_mode=False,
     )
 
     module._ansible_debug = True
+    check_imports(module)
     setup_logging()
 
     options.dm_password = module.params.get('dm_password')