skylab_staging: Add dummy_PassServer.nossp to staging test

This test is required to ensure that skylab respects test control's
directive to disable SSP.

BUG=chromium:871439
TEST=None

Change-Id: I5ba39d4f86c2caff7b54ce33a4278e84c5a3b710
Reviewed-on: https://chromium-review.googlesource.com/1178470
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Allen Li <ayatane@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
diff --git a/server/site_tests/dummy_PassServer/control.nossp b/server/site_tests/dummy_PassServer/control.nossp
index 2ee1c17..a44ad29 100644
--- a/server/site_tests/dummy_PassServer/control.nossp
+++ b/server/site_tests/dummy_PassServer/control.nossp
@@ -6,7 +6,11 @@
 NAME = "dummy_PassServer_nossp"
 PURPOSE = "Demonstrate success methods of autotests."
 CRITERIA = "This test will always succeed."
-ATTRIBUTES = "suite:dummy_server, suite:dummy_server_nossp"
+ATTRIBUTES = (
+        "suite:dummy_server,"
+        " suite:dummy_server_nossp,"
+        " suite:skylab_staging_test"
+)
 TIME = "SHORT"
 TEST_CATEGORY = "General"
 TEST_CLASS = "dummy"