Xenial eclipses Trusty
Xenial eclipses Trusty

fixes:
```
Task 44 | 19:50:28 | Preparing deployment: Preparing deployment (00:00:00)
                   L Error: Stemcell with Operating System 'ubuntu-trusty' doesn't exist
```

cloudfoundry-community/ntp-release,cunnie/bosh-ntp-release,cunnie/bosh-ntp-release,cloudfoundry-community/ntp-release