Refactor/Add HM_Respondent tests
Copes with HM sending incorrect stop commands [fixes #48374009]
Fix failing equality test
refactor #repack_app_in

+ remove unused variable in object serialization
Add more logging when repacking app fails
remove dead code
Add CrashEvent model
New DeaRespondent class saves crash messages from dea
Make integration spec setup better
Fix crash_events migration
Filter crash messages in droplet.exited channel
Add missing spec
fix errant 0% health reporting

if the health manager is slow to respond, return nil for that app's
running instances to indicate lack of knowledge, not lack of running
instances

[finishes #47900639]
Debugger in CCNG
Add public flag to service plans

Make non-public service plans only visible to admins
and users in privileged orgs
Add timestamp field to crash_events table.
Fix the build
Allow updating public flag on service plans.
Catch exception so CC doesn't crash when losing NATS [#47652323]
Resubscribe to subscriptions once nats is back up