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/systems/test_boot_devices.robot b/redfish/systems/test_boot_devices.robot
index e567027..de636b6 100644
--- a/redfish/systems/test_boot_devices.robot
+++ b/redfish/systems/test_boot_devices.robot
@@ -10,7 +10,7 @@
 Test Teardown    Test Teardown Execution
 Suite Teardown   Suite Teardown Execution
 
-Force Tags       Boot_Devices
+Test Tags       Boot_Devices
 
 *** Variables ***
 # Maps for correlating redfish data values to IPMI data values.