Bug 1140546 - Add automatic reruns to decision tasks r=me a=taskcluster-only

--HG--
extra : rebase_source : af7a03ed7238edc7f22f1296f7059b234904146d

testing/taskcluster/tasks/decision/branch.yml

@@ -14,6 +14,7 @@ scopes:
   - scheduler:*
 tasks:
   - taskId: '{{#as_slugid}}decision task{{/as_slugid}}'
+    reruns: 3
     task:
       created: '{{now}}'
       deadline: '{{#from_now}}1 day{{/from_now}}'

testing/taskcluster/tasks/decision/try.yml

@@ -15,6 +15,7 @@ scopes:
 
 tasks:
   - taskId: '{{#as_slugid}}decision task{{/as_slugid}}'
+    reruns: 3
     task:
       created: '{{now}}'
       deadline: '{{#from_now}}1 day{{/from_now}}'