Move bosh-release-tests dockerfile to persi-ci
Move bosh-release-tests dockerfile to persi-ci

- They are used by other releases
[#172272424](https://www.pivotaltracker.com/story/show/172272424)

Co-authored-by: Lisa Burns <53c7312eb9f02149a2ed58fc14d78d4142caa3c0@pivotal.io>
Co-authored-by: Paul Warren <63139dc55f55b242580df2a78e9f22f16d483738@pivotal.io>

cloudfoundry-incubator/nfs-volume-release,cloudfoundry-incubator/nfs-volume-release,cloudfoundry-incubator/nfs-volume-release