HIVE-2588 [jira] Update arcconfig to include commit listener (Marek Sapota via John Sichi)
HIVE-2588 [jira] Update arcconfig to include commit listener
(Marek Sapota via John Sichi)

Summary:
Add CommitListener as an event listener.

Use CommitListener from Arc-JIRA to modify commit message and include `(author
via committer)` when running `arc commit`.

Test Plan: EMPTY

Reviewers: JIRA, jsichi

Reviewed By: jsichi

CC: jsichi

Differential Revision: 477

git-svn-id: c2303eb81cb646bce052f55f7f0d14f181a5956c@1203046 13f79535-47bb-0310-9956-ffa450edef68

b-slim/hive,b-slim/hive,nishantmonu51/hive,nishantmonu51/hive,alanfgates/hive,vineetgarg02/hive,anishek/hive,b-slim/hive,jcamachor/hive,b-slim/hive,b-slim/hive,alanfgates/hive,b-slim/hive,vergilchiu/hive,vergilchiu/hive,nishantmonu51/hive,sankarh/hive,lirui-apache/hive,vineetgarg02/hive,alanfgates/hive,anishek/hive,anishek/hive,anishek/hive,jcamachor/hive,vergilchiu/hive,nishantmonu51/hive,lirui-apache/hive,lirui-apache/hive,sankarh/hive,nishantmonu51/hive,alanfgates/hive,nishantmonu51/hive,vergilchiu/hive,jcamachor/hive,anishek/hive,nishantmonu51/hive,jcamachor/hive,vineetgarg02/hive,jcamachor/hive,vergilchiu/hive,alanfgates/hive,vineetgarg02/hive,sankarh/hive,nishantmonu51/hive,lirui-apache/hive,sankarh/hive,alanfgates/hive,sankarh/hive,b-slim/hive,lirui-apache/hive,nishantmonu51/hive,lirui-apache/hive,vergilchiu/hive,anishek/hive,sankarh/hive,lirui-apache/hive,alanfgates/hive,alanfgates/hive,sankarh/hive,vergilchiu/hive,vergilchiu/hive,lirui-apache/hive,anishek/hive,vineetgarg02/hive,vineetgarg02/hive,vineetgarg02/hive,anishek/hive,jcamachor/hive,lirui-apache/hive,jcamachor/hive,sankarh/hive,jcamachor/hive,alanfgates/hive,vineetgarg02/hive,jcamachor/hive,vineetgarg02/hive,b-slim/hive,sankarh/hive,anishek/hive,vergilchiu/hive,b-slim/hive