Bump loggregator_emitter version

Signed-off-by: Stephan Hagemann <stephan@pivotallabs.com>
Forward the broker error description, if present
Imports tags from v2 service broker catalog.

[#58276980]
Clear database before apps api spec

App.first returns first based on guid, which is effectively a randomly
chosen App -- occasionally it would get one with a service binding,
which can only be deleted with recursive:true.
Make syslog_drain_url optional
Make dashboard_url optional
Finish up adding fields to the api docs
Staging message admin buildpack list is ordered by priority
Exclude the buildpacks which haven't been uploaded yet from the staging message

* Added an integration spec which tests the entire flow for app stage for CC with buildpacks
* Changed how UploadHandler works
Futher fixes to the api docs
Correct the output when downloading a droplet or buildpack cache
The bootstrap CSS should loaded with no scheme so that it works on http and https.
Change the POST /v2/buildpacks/<guid>/bits to a PUT to match the app bits upload and since semantically we are replacing not adding the buildpack bits.
send nil download URI if local blob doesn't exist

This is one half of the fix for DEA staging on deployments without a
remote blobstore. The other half is in the DEA, for it to cope with
failed downloads properly. Previously it would try to extract an empty
file after failing to download.

[#58571584]
Add the curl command to the api docs
Auto-merge remote-tracking branch 'upstream/master'