Log any CSP errors that occur when disabling a user.

When one user disables another's environment role in Azure, sometimes an
exception will be raised. Since we catch the exception and display an
error message to the user, we should also log the exception so that the
error is traceable later.

tests/utils.py

@@ -40,6 +40,9 @@ class FakeLogger:
     def error(self, msg, *args, **kwargs):
         self._log("error", msg, *args, **kwargs)
 
+    def exception(self, msg, *args, **kwargs):
+        self._log("exception", msg, *args, **kwargs)
+
     def _log(self, _lvl, msg, *args, **kwargs):
         self.messages.append(msg)
         if "extra" in kwargs: