misc: handle unpickling from classes that used absolute import (#36565)

wcs/publisher.py

@@ -54,6 +54,8 @@ class UnpicklerClass(pickle.Unpickler):
     def find_class(self, module, name):
         if module == 'qommon.form':
             module = 'wcs.qommon.form'
+        elif module in ('formdata', 'formdef', 'users', 'workflows'):
+            module = 'wcs.%s' % module
         __import__(module)
         mod = sys.modules[module]
         klass = getattr(mod, name)