Enable slack notifications for push and rebase jobs

Change-Id: Ib20225ffff100b330819c24dc40a4176f917e819
diff --git a/jjb/global/global-templates-push-upstream.yaml b/jjb/global/global-templates-push-upstream.yaml
index 7b5612e..322efa4 100644
--- a/jjb/global/global-templates-push-upstream.yaml
+++ b/jjb/global/global-templates-push-upstream.yaml
@@ -32,3 +32,7 @@
     builders:
       - shell:
           !include-raw-escape: ./push-upstream-jobs.sh
+
+    publishers:
+      - notify-slack:
+          slack-channel: '#infra'
diff --git a/jjb/global/global-templates-rebase.yaml b/jjb/global/global-templates-rebase.yaml
index 38712ae..d740404 100644
--- a/jjb/global/global-templates-rebase.yaml
+++ b/jjb/global/global-templates-rebase.yaml
@@ -36,3 +36,7 @@
     builders:
       - shell:
           !include-raw-escape: ./rebase-jobs.sh
+
+    publishers:
+      - notify-slack:
+          slack-channel: '#infra'