Add NoneType check for the 'aaff' argument to Affinity Rules management logic of the 'Decort.Controller.compute_affinity' method.

module_utils/decort_utils.py

@@ -1257,7 +1257,7 @@ class DecortController(object):
         if comp_dict['antiAffinityRules']:
             for rule in comp_dict['antiAffinityRules']:
                 del rule['guid']
-                if rule not in aaff:
+                if not aaff or rule not in aaff:
                     aaffrule_del.append(rule)
 
         if aaff: