Update HTTPS header security content

Change-Id: Ib6063d16be2721b7ac575abff19b2c8c39f31b87
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/service_root/test_service_root_security.robot b/redfish/service_root/test_service_root_security.robot
index bf8b8f8..311a368 100644
--- a/redfish/service_root/test_service_root_security.robot
+++ b/redfish/service_root/test_service_root_security.robot
@@ -16,7 +16,7 @@
 ...                     X-Frame-Options=DENY
 ...                     Pragma=no-cache
 ...                     Cache-Control=no-Store,no-Cache
-...                     Content-Security-Policy=default-src 'self'; img-src 'self' data:
+...                     Content-Security-Policy=default-src 'none'; img-src 'self' data:; font-src 'self'; style-src 'self'; script-src 'self'; connect-src 'self' wss:
 ...                     X-XSS-Protection=1; mode=block
 ...                     X-Content-Type-Options=nosniff