Adjust booleans in system modules (#5153)

* 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>

plugins/modules/system/crypttab.py

@@ -21,7 +21,7 @@ options:
         optionally prefixed with C(/dev/mapper/), as it appears in the filesystem. I(/dev/mapper/)
         will be stripped from I(name).
     type: str
-    required: yes
+    required: true
   state:
     description:
       - Use I(present) to add a line to C(/etc/crypttab) or update its definition
@@ -31,7 +31,7 @@ options:
         different values will be updated.
       - Use I(opts_absent) to remove options from the existing set.
     type: str
-    required: yes
+    required: true
     choices: [ absent, opts_absent, opts_present, present ]
   backing_device:
     description: