Give admins exclusive core review +2/-2

Change-Id: Id30e86546124aa7846b3689dda1550ff3cb23bed
diff --git a/groups b/groups
new file mode 100644
index 0000000..ac89523
--- /dev/null
+++ b/groups
@@ -0,0 +1,3 @@
+# UUID                                  	Group Name
+#
+bea19bca45d7ad00015a9adb7e7669efdfa8c4e8	Administrators
diff --git a/project.config b/project.config
index a28a59a..3e561ce 100644
--- a/project.config
+++ b/project.config
@@ -5,4 +5,5 @@
 [access "refs/for/*"]
 	exclusiveGroupPermissions = addPatchSet
 [access "refs/heads/*"]
-	exclusiveGroupPermissions = submit
+	exclusiveGroupPermissions = label-Code-Review submit
+	label-Code-Review = -2..+2 group Administrators