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/junos/junos_config.py

@@ -32,8 +32,6 @@ options:
         lines to push into the remote device.  Each line must start with
         either C(set) or C(delete).  This argument is mutually exclusive
         with the I(src) argument.
-    required: false
-    default: null
   src:
     description:
       - The I(src) argument provides a path to the configuration file
@@ -41,8 +39,6 @@ options:
         system path to the configuration file if the value starts with /
         or relative to the root of the implemented role or playbook.
         This argument is mutually exclusive with the I(lines) argument.
-    required: false
-    default: null
     version_added: "2.2"
   src_format:
     description:
@@ -50,8 +46,6 @@ options:
         found int I(src).  If the I(src_format) argument is not provided,
         the module will attempt to determine the format of the configuration
         file specified in I(src).
-    required: false
-    default: null
     choices: ['xml', 'set', 'text', 'json']
     version_added: "2.2"
   rollback:
@@ -61,16 +55,12 @@ options:
         argument.  If the specified rollback identifier does not
         exist on the remote device, the module will fail.  To rollback
         to the most recent commit, set the C(rollback) argument to 0.
-    required: false
-    default: null
   zeroize:
     description:
       - The C(zeroize) argument is used to completely sanitize the
         remote device configuration back to initial defaults.  This
         argument will effectively remove all current configuration
         statements on the remote device.
-    required: false
-    default: null
   confirm:
     description:
       - The C(confirm) argument will configure a time out value for
@@ -78,14 +68,12 @@ options:
         rolled back.  If the C(confirm) argument is set to False, this
         argument is silently ignored.  If the value for this argument
         is set to 0, the commit is confirmed immediately.
-    required: false
     default: 0
   comment:
     description:
       - The C(comment) argument specifies a text string to be used
         when committing the configuration.  If the C(confirm) argument
         is set to False, this argument is silently ignored.
-    required: false
     default: configured by junos_config
   replace:
     description:
@@ -97,9 +85,8 @@ options:
         the equivalent, set the I(update) argument to C(replace). This argument
         will be removed in a future release. The C(replace) and C(update) argument
         is mutually exclusive.
-    required: false
-    choices: ['yes', 'no']
-    default: false
+    type: bool
+    default: 'no'
   backup:
     description:
       - This argument will cause the module to create a full backup of
@@ -107,9 +94,8 @@ 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
-    default: no
-    choices: ['yes', 'no']
+    type: bool
+    default: 'no'
     version_added: "2.2"
   update:
     description:
@@ -125,7 +111,6 @@ options:
         it with the loaded configuration.
         C(replace) substitutes each hierarchy level in the loaded configuration
         for the corresponding level.
-    required: false
     default: merge
     choices: ['merge', 'override', 'replace']
     version_added: "2.3"
@@ -133,9 +118,8 @@ options:
     description:
       - This argument will execute commit operation on remote device.
         It can be used to confirm a previous commit.
-    required: false
-    default: no
-    choices: ['yes', 'no']
+    type: bool
+    default: 'no'
     version_added: "2.4"
 requirements:
   - ncclient (>=v0.5.2)