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/update_service/test_bmc_image_switch.robot b/redfish/update_service/test_bmc_image_switch.robot
index 77e839e..787d645 100755
--- a/redfish/update_service/test_bmc_image_switch.robot
+++ b/redfish/update_service/test_bmc_image_switch.robot
@@ -11,7 +11,7 @@
 Suite Teardown           Run Keyword And Ignore Error  Redfish.Logout
 Test Teardown            FFDC On Test Case Fail
 
-Force Tags               Bmc_Image_Switch
+Test Tags               Bmc_Image_Switch
 
 *** Variables ***