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/task_service/test_tasks_service.robot b/redfish/task_service/test_tasks_service.robot
index 27f7e53..0f67cb9 100644
--- a/redfish/task_service/test_tasks_service.robot
+++ b/redfish/task_service/test_tasks_service.robot
@@ -13,7 +13,7 @@
 Suite Teardown      Suite Teardown Execution
 Test Teardown       FFDC On Test Case Fail
 
-Force Tags          Tasks_Service
+Test Tags          Tasks_Service
 
 *** Variables ***
 ${TIME_REGEXP_PATTERN}   (.+)[\\-|\\+]\\d\\d\\:\\d\\d