Adjust booleans in system modules (#5153) (#5178)

* Adjust booleans in system modules.

* Fix some IP addresses

Co-authored-by: Sandra McCann <samccann@redhat.com>

Co-authored-by: Sandra McCann <samccann@redhat.com>
(cherry picked from commit be2de15c66)

plugins/modules/system/gconftool2.py

@@ -23,7 +23,7 @@ options:
     description:
     - A GConf preference key is an element in the GConf repository
       that corresponds to an application preference. See man gconftool-2(1)
-    required: yes
+    required: true
   value:
     type: str
     description:
@@ -39,7 +39,7 @@ options:
     type: str
     description:
     - The action to take upon the key/value.
-    required: yes
+    required: true
     choices: [ absent, get, present ]
   config_source:
     type: str
@@ -52,7 +52,7 @@ options:
       specified then the config_source must be specified as well.
       See man gconftool-2(1)
     type: bool
-    default: 'no'
+    default: false
 '''
 
 EXAMPLES = """
@@ -187,11 +187,11 @@ def main():
                                  % str(state))
 
         if direct and config_source is None:
-            module.fail_json(msg='If "direct" is "yes" then the ' +
+            module.fail_json(msg='If "direct" is "true" then the ' +
                                  '"config_source" must be specified')
         elif not direct and config_source is not None:
             module.fail_json(msg='If the "config_source" is specified ' +
-                                 'then "direct" must be "yes"')
+                                 'then "direct" must be "true"')
 
     # Create a gconf2 preference
     gconf_pref = GConf2Preference(module, key, value_type,