mso_contract_filter: Improve logic (#51315)

This PR improves the jsonpatch logic.

lib/ansible/module_utils/network/aci/mso.py

@@ -180,6 +180,10 @@ class MSOModule(object):
         if method is not None:
             self.method = method
 
+        # If we PATCH with empty operations, return
+        if method == 'PATCH' and not data:
+            return {}
+
         self.url = urljoin(self.baseuri, path)
 
         if qs is not None: