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/awall.py

@@ -35,7 +35,7 @@ options:
       - Activate the new firewall rules.
       - Can be run with other steps or on its own.
     type: bool
-    default: no
+    default: false
 '''
 
 EXAMPLES = r'''
@@ -50,11 +50,11 @@ EXAMPLES = r'''
     - foo
     - bar
     state: disabled
-    activate: no
+    activate: false
 
 - name: Activate currently enabled firewall rules
   community.general.awall:
-    activate: yes
+    activate: true
 '''
 
 RETURN = ''' # '''