Fix release_name bosh-deploy-with-created-release

[mcwumbly]

oops.

fast follow up on: https://github.com/cloudfoundry/cf-deployment-concourse-tasks/pull/114

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/174153341

The labels on this github issue will be updated when the story is started.