osx_defaults: Do not make any changes in check mode

lib/ansible/modules/extras/system/osx_defaults.py

@@ -257,6 +257,8 @@ class OSXDefaults(object):
             print "Absent state detected!"
             if self.current_value is None:
                 return False
+            if self.module.check_mode:
+                return True
             self.delete()
             return True
 
@@ -274,6 +276,9 @@ class OSXDefaults(object):
         elif self.current_value == self.value:
             return False
 
+        if self.module.check_mode:
+            return True
+
         # Change/Create/Set given key/value for domain in defaults
         self.write()
         return True