Add announce and enable_hooks to Job Schema table
Add announce and enable_hooks to Job Schema table

Reviewed at https://reviews.apache.org/r/49330/

rdelval/aurora,medallia/aurora,thinker0/aurora,apache/aurora,medallia/aurora,crashlytics/aurora,medallia/aurora,crashlytics/aurora,crashlytics/aurora,crashlytics/aurora,thinker0/aurora,thinker0/aurora,apache/aurora,medallia/aurora,crashlytics/aurora,crashlytics/aurora,rdelval/aurora,apache/aurora,thinker0/aurora,apache/aurora,thinker0/aurora,medallia/aurora,rdelval/aurora,rdelval/aurora,thinker0/aurora,rdelval/aurora,apache/aurora,medallia/aurora,apache/aurora,rdelval/aurora