Update README for running acceptance manually
Update README for running acceptance manually

[#103148220]

Signed-off-by: Atul Kshirsagar <80db663a825ead6639a4b6bb3a323b92d8ba5f9a@gmail.com>

cloudfoundry-incubator/cf-tcp-router-acceptance-tests,cloudfoundry-incubator/cf-tcp-router-acceptance-tests