Revert "Fix remove callback user privilege access to login"

This reverts commit 8e69d148249f6a45cea10e988ec03430a5932784.

Reason for revert: This causes service validator failures.

I missed the fact that despite being asked a couple times, the service validator wasn't run.  Please run it, resolve your bug, and resubmit as a new review.

Change-Id: I0bb61ab1a618a96b2ed2c600825ec72b8d020ec0
diff --git a/redfish-core/lib/roles.hpp b/redfish-core/lib/roles.hpp
index 956f566..fbe8653 100644
--- a/redfish-core/lib/roles.hpp
+++ b/redfish-core/lib/roles.hpp
@@ -61,7 +61,7 @@
     }
     else if (role == "Callback")
     {
-        privArray = {};
+        privArray = {"Login"};
     }
     else
     {