[batman] fix upload-lb-cert input
[batman] fix upload-lb-cert input

[#170059380](https://www.pivotaltracker.com/story/show/170059380)

Co-authored-by: Clay Kauzlaric <b161dd152ba17987305414195d30c2af856d229f@pivotal.io>

cloudfoundry-incubator/cf-routing-release,cloudfoundry-incubator/cf-routing-release,cloudfoundry-incubator/cf-routing-release