Switch from Force Tags to Test Tags

Force Tags is deprecated in Robot 7.0 and will eventually
warn and then after that stop working. Test Tags performs
the same function per docs.

Change-Id: I7cf305754b247b995a05d8da3b9de9ed613ecae2
Signed-off-by: Matt Fischer <matthew.fischer@hpe.com>
diff --git a/redfish/service_root/test_service_root.robot b/redfish/service_root/test_service_root.robot
index 9f83e2e..b505b6f 100644
--- a/redfish/service_root/test_service_root.robot
+++ b/redfish/service_root/test_service_root.robot
@@ -8,7 +8,7 @@
 Test Teardown    FFDC On Test Case Fail
 Test Setup       Printn
 
-Force Tags       Service_Root
+Test Tags       Service_Root
 
 *** Test Cases ***