When deleting a custom test status that users are using in the Test Execution Filters, each time the Test execution is loaded a stacktrace will be shown

When deleting a custom test status that users are using in the Test Execution Filters, each time the Test execution is loaded a stacktrace will be shown.

1. Create a Custom Test Status Manager: "To_be_deleted"
2. Use it as a filter in a Test Execution
3. Erase the custom test status from the administration 
4. Go to the Execution where the status was being used a filter