Allow user to set disk size for stemcell creation

You can now pass a third argument to the rake task for setting the root
disk size.

Signed-off-by: Chris Brown <cbrown@pivotallabs.com>
Make data dog key configurable
[director] Clean up failed compilation vms [fixes #47914043]
move vcloud gems out of bosh repository
Revert "move vcloud gems out of bosh repository"

This reverts commit e6c80633d7cf420be5d165b384dbcdd1cb51f13c.
Improve description tag

* Make sanitization more robust
* Include ExampleGroup's description
Properly namespace EmitableExample
Avoid double quotes for uninterpolated string
Do not need global constant
Prefer symbol for Rake namespace
Optionally report bat timings to datadog
Work in progress for config refactoring.
Completed refactoring of the Config wrt blobstores.
Send sandbox process error output to a different file
Renamed tar_gziper -> tar_gzipper, minor refactor of DI in Backup job.
Add DI for db_adapter in Backup Job
Adding `.job_type` to all jobs
Added JobQueue
Change JobQueue#enqueue signature
All Job enqueuing goes through JobQueue