luci-scheduler: allow bb-schedulers to trigger.

Allow project-chromeos-buildbucket-schedulers to trigger jobs via LUCI
scheduler.  This allows Recipes to use scheduler.emit_trigger().

BUG=b:167619469
TEST=unit tests pass

Change-Id: I18f6e71d815eb185659ecc6e0d26f98921432382
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/2414146
Tested-by: LaMont Jones <lamontjones@chromium.org>
Auto-Submit: LaMont Jones <lamontjones@chromium.org>
Reviewed-by: David Burger <dburger@chromium.org>
Commit-Queue: LaMont Jones <lamontjones@chromium.org>
diff --git a/config/luci-scheduler.cfg b/config/luci-scheduler.cfg
index 9f1f0e1..f7b3f84 100644
--- a/config/luci-scheduler.cfg
+++ b/config/luci-scheduler.cfg
@@ -21,6 +21,7 @@
   acls {
     role: TRIGGERER
     granted_to: "group:mdb/chromeos-build-access"
+    granted_to: "group:project-chromeos-buildbucket-schedulers"
   }
 }
 
diff --git a/scripts/gen_luci_scheduler.py b/scripts/gen_luci_scheduler.py
index 2c06481..7d6b7c7 100644
--- a/scripts/gen_luci_scheduler.py
+++ b/scripts/gen_luci_scheduler.py
@@ -56,6 +56,7 @@
   acls {
     role: TRIGGERER
     granted_to: "group:mdb/chromeos-build-access"
+    granted_to: "group:project-chromeos-buildbucket-schedulers"
   }
 }
 """
diff --git a/scripts/gen_luci_scheduler_unittest.py b/scripts/gen_luci_scheduler_unittest.py
index 4ece1a8..dffe49d 100644
--- a/scripts/gen_luci_scheduler_unittest.py
+++ b/scripts/gen_luci_scheduler_unittest.py
@@ -303,6 +303,7 @@
   acls {
     role: TRIGGERER
     granted_to: "group:mdb/chromeos-build-access"
+    granted_to: "group:project-chromeos-buildbucket-schedulers"
   }
 }