Remove redundant test
Remove redundant test

- Config validation is already covered in a config unit test
- There is one remaining integration test that covers config valdation

Signed-off-by: Tyler Schultz <6b7a73f4f7cffc2a148becd12890940350ddfa95@pivotal.io>

cloudfoundry-incubator/route-registrar,cloudfoundry-incubator/route-registrar