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: https://svn.apache.org/repos/asf/hive/trunk@1203046 13f79535-47bb-0310-9956-ffa450edef68

Author: John Sichi

.arcconfig

@@ -6,6 +6,7 @@
     "arc_jira_lib" : ".arc_jira_lib"
   },
   "arcanist_configuration" : "ArcJIRAConfiguration",
+  "events.listeners" : ["CommitListener"],
   "jira_base_url" : "https://issues.apache.org/jira/secure/",
   "jira_api_url" : "https://issues.apache.org/jira/si/",
   "jira_project" : "HIVE",