Removed Backtraces to loggerator emit error messages
[MIGRATION] remove unencrypted environment_json column

We now only have encrypted_environment_json. Migration is able to be
rolled back.

[finishes #54119563]
Events are ordered by timestamp by default

[finishes #56661188]
[MIGRATION] Add long description to service

[#48629153]
Add long_description to service

Only to POST on service endpoint

[#48629153]
don't try to remove buildpack from blobstore if it was never uploaded

[#56723198]
Only zip format admin buildpacks are allowed.