Set id for new build canary (#437)

Author: rsandor

ansible/delta-hosts/variables

@@ -43,7 +43,7 @@ intercom_api_key=14771f14efb617900724a16345e57beb55ba9beb
 intercom_app_id=wqzm3rju
 khronos_canary_github_branches_instance_id=56f05754a443842400b66a53
 khronos_canary_logs_instance_id=56f07f5c1e089a200077f2a3
-khronos_canary_rebuild_instance_id=56df6674058d592500f76c9f
+khronos_canary_rebuild_instance_id=571b39b9d35173300021667d
 khronos_canary_rebuild_navi_url=http://canary-build-staging-runnabletest.runnableapp.com:8000/
 khronos_canary_token=24592325a6f881e77a01e3bacf0952c49f4e9f1c
 khronos_mongo_auth=api:72192e5a-a5e1-11e5-add9-0270db32f7ad