BOSH 2.0 support - only support bosh2 format releases, single manifests/thing.yml

[drnic]

See https://github.com/cloudfoundry-community/bosh-gen/projects/1

With bosh2 now GA, we are migrating all community releases to assume bosh2 usage. There are some subtle required changes, and some stylistic changes. This PR for bosh-gen is so that new BOSH releases look and feel like this new style.

bosh-gen will also try to help generate releases that produce no bosh-lint linting errors (read introduction)

Local installation

git clone https://github.com/cloudfoundry-community/bosh-gen -b bosh2
cd bosh-gen
bundle
rake install:local

Changes

Required for bosh2

• config/private.yml schema changed

Style/lint changes

• single manifest that "just works", rather than templates/make_manifest to merge several part files together. Generated stub manifests/thing.yml should be updated as you develop your release to always deploy a useful working system. bosh2 deploy manifests/thing.yml should "just work" please.
• ctl for name of job monit control script

Removed

• bosh1 ruby plugin - bosh2 is written in golang and does not support plugins; I'm unsure how much this plugin was used; but if it was then it needs rewriting
• old specs + .travis.yml for testing generators; instead we'll look at having integration tests via CI
• data/properties.sh template - it wasn't a pattern that was being adopted

[drnic]

v0.90.0 has been cut which include WIP on bosh2 support