Remove mockserver from manage.py
Remove mockserver from manage.py

This was a relic from when we used to have nightwatchjs tests run by jenkins
The nightwatchjs end-to-end tests has been moved to https://github.com/ministryofjustice/laa-cla-e2e-tests

ministryofjustice/cla_public,ministryofjustice/cla_public,ministryofjustice/cla_public,ministryofjustice/cla_public