Don't rely on DNS failure to show error
Don't rely on DNS failure to show error

The test may take too long to run

[#131931207]

Signed-off-by: Edwin Xie <6bc24e9c160281972837d9e13287696d26612564@pivotal.io>

cloudfoundry-incubator/routing-api-cli,cloudfoundry-incubator/routing-api-cli