Support for pre-start scripts in jobs

[rboykin]

@yudai Newer versions of cf-release (238, 239, etc.) include pre-start scripts in their jobs. In many cases, these scripts create directories for use in the actual jobs. The existing cf_nise_installer does not invoke these and as a result these jobs in these releases will not work. I note mention of support for pre-start scripts added here: https://bosh.io/docs/pre-start.html

Do you have intention of updating nise_bosh and cf_nise_installer to a newer level to include support for items such as pre-start scripts?

[rboykin]

I also find that the newer levels of cf-release use the property spec.bootstrap as a boolean. This property is used in both the pre-start and post-start scripts of the cloud_controller_ng job. In the pre-start case this value gates logic used to migrate the CCDB to the latest level. In the post-start script, this value gates logic to populate buildpacks. Since the spec.bootstrap value is not supported in the current cf_nise_installer, neither the CCDB migration nor the buildpack population gets done.

[yudai]

Unfortunately, I don't have enough time to take a look into the new features of BOSH right now.