Add retry logic for scaling test
Add retry logic for scaling test

- Fix sampleConnections to not modify conns

[#145382477]

Signed-off-by: Angela Chin <09c3fe443cd90255b3ab6945ab331bb5cdf11ccb@pivotal.io>

cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release