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/network/cloudengine/ce_config.py

@@ -39,16 +39,12 @@ options:
         in the device current-configuration.  Be sure to note the configuration
         command syntax as some commands are automatically modified by the
         device config parser.
-    required: false
-    default: null
   parents:
     description:
       - The ordered set of parents that uniquely identify the section or hierarchy
         the commands should be checked against.  If the parents argument
         is omitted, the commands are checked against the set of top
         level or global commands.
-    required: false
-    default: null
   src:
     description:
       - The I(src) argument provides a path to the configuration file
@@ -57,8 +53,6 @@ options:
         or relative to the root of the implemented role or playbook.
         This argument is mutually exclusive with the I(lines) and
         I(parents) arguments.
-    required: false
-    default: null
   before:
     description:
       - The ordered set of commands to push on to the command stack if
@@ -66,16 +60,12 @@ options:
         the opportunity to perform configuration commands prior to pushing
         any changes without affecting how the set of commands are matched
         against the system.
-    required: false
-    default: null
   after:
     description:
       - The ordered set of commands to append to the end of the command
         stack if a change needs to be made.  Just like with I(before) this
         allows the playbook designer to append a set of commands to be
         executed after the command set.
-    required: false
-    default: null
   match:
     description:
       - Instructs the module on the way to perform the matching of
@@ -86,7 +76,6 @@ options:
         must be an equal match.  Finally, if match is set to I(none), the
         module will not attempt to compare the source configuration with
         the current-configuration on the remote device.
-    required: false
     default: line
     choices: ['line', 'strict', 'exact', 'none']
   replace:
@@ -97,7 +86,6 @@ options:
         mode.  If the replace argument is set to I(block) then the entire
         command block is pushed to the device in configuration mode if any
         line is not correct.
-    required: false
     default: line
     choices: ['line', 'block']
   backup:
@@ -107,9 +95,8 @@ options:
         changes are made.  The backup file is written to the C(backup)
         folder in the playbook root directory.  If the directory does not
         exist, it is created.
-    required: false
     type: bool
-    default: false
+    default: 'no'
   config:
     description:
       - The module, by default, will connect to the remote device and
@@ -119,8 +106,6 @@ options:
         every task in a playbook.  The I(config) argument allows the
         implementer to pass in the configuration to use as the base
         config for comparison.
-    required: false
-    default: null
   defaults:
     description:
       - The I(defaults) argument will influence how the current-configuration
@@ -128,9 +113,8 @@ options:
         the command used to collect the current-configuration is append with
         the all keyword.  When the value is set to false, the command
         is issued without the all keyword.
-    required: false
     type: bool
-    default: false
+    default: 'no'
   save:
     description:
       - The C(save) argument instructs the module to save the
@@ -139,9 +123,8 @@ options:
         no changes are made, the configuration is still saved to the
         startup config.  This option will always cause the module to
         return changed.
-    required: false
     type: bool
-    default: false
+    default: 'no'
 """
 
 EXAMPLES = """