Clean up module documentation (#36909)

* Clean up module documentation

This PR includes:
- Removal of `default: None` (and variations)
- Removal of `required: false`
- Fixing booleans and `type: bool` where required

* Fix remaining (new) validation issues

lib/ansible/modules/web_infrastructure/jenkins_script.py

@@ -30,41 +30,32 @@ options:
       - The groovy script to be executed.
         This gets passed as a string Template if args is defined.
     required: true
-    default: null
   url:
     description:
       - The jenkins server to execute the script against. The default is a local
         jenkins instance that is not being proxied through a webserver.
-    required: false
     default: http://localhost:8080
   validate_certs:
     description:
       - If set to C(no), the SSL certificates will not be validated.
         This should only set to C(no) used on personally controlled sites
         using self-signed certificates as it avoids verifying the source site.
-    required: false
-    default: True
+    type: bool
+    default: 'yes'
   user:
     description:
       - The username to connect to the jenkins server with.
-    required: false
-    default: null
   password:
     description:
       - The password to connect to the jenkins server with.
-    required: false
-    default: null
   timeout:
     description:
       - The request timeout in seconds
-    required: false
     default: 10
     version_added: "2.4"
   args:
     description:
       - A dict of key-value pairs used in formatting the script using string.Template (see https://docs.python.org/2/library/string.html#template-strings).
-    required: false
-    default: null
 
 notes:
     - Since the script can do anything this does not report on changes.