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/ipmi/test_get_bios_post_code.robot b/ipmi/test_get_bios_post_code.robot
index 869646a..d49a6b0 100644
--- a/ipmi/test_get_bios_post_code.robot
+++ b/ipmi/test_get_bios_post_code.robot
@@ -9,7 +9,7 @@
 Suite Setup      IPMI Power On
 Suite Teardown   IPMI Power On  stack_mode=skip  quiet=1
 
-Force Tags       Get_BIOS_Post_Code
+Test Tags       Get_BIOS_Post_Code
 
 *** Test Cases ***