Adjust booleans in source control modules. (#5158) (#5172)

(cherry picked from commit 675bdef190)

Co-authored-by: Felix Fontein <felix@fontein.de>

plugins/modules/source_control/gitlab/gitlab_user.py

@@ -102,17 +102,17 @@ options:
     description:
       - Require confirmation.
     type: bool
-    default: yes
+    default: true
   isadmin:
     description:
       - Grant admin privileges to the user.
     type: bool
-    default: no
+    default: false
   external:
     description:
       - Define external parameter for this user.
     type: bool
-    default: no
+    default: false
   identities:
     description:
       - List of identities to be added/updated for this user.