Add jobs for fabric-tna GitHub repo

Change-Id: Id4b18a73837d9670b6902317d210950f1ae0707c
diff --git a/jjb/defaults.yaml b/jjb/defaults.yaml
index afa49e8..d4256df 100644
--- a/jjb/defaults.yaml
+++ b/jjb/defaults.yaml
@@ -38,6 +38,13 @@
     # User account with gerrit SSH credentials
     gerrit-ssh-credential: 'onos-gerrit-ssh'
 
+    # SSH credentials for onf-bot GitHub account
+    github-onf-bot-ssh-credential: 'github-onf-bot-ssh-key'
+
+    # Auth IDs for Github Pull Request Builder plugin:
+    # - Auth ID for GitHub account "onf-bot" (via Personal Access Token)
+    github-pr-auth-id-onf-bot: '3a50653e-c14e-4a15-bfbc-206c6a4eccac'
+
     # Java glob of artifacts to archive
     archive-artifacts: ''