Transition.py: give Owner full right tu execute workflow method.

product/ERP5Workflow/Document/Transition.py

@@ -101,6 +101,11 @@ class Transition(IdAsReferenceMixin("transition_", "prefix"), XMLObject):
       self.guard = Guard()
     if self.getRoleList() is not None:
       self.guard.roles = self.getRoleList()
+      if self.guard.roles is not None and 'Owner' not in self.guard.roles:
+        # Owner(Zope) should have all rights to debug, why not?
+        self.guard.roles.append('Owner')
+      if not self.guard.roles:
+        self.guard.roles = ['Owner']
     if self.getPermissionList() is not None:
       self.guard.permissions = self.getPermissionList()
     if self.getGroupList() is not None: