Add support for host BIOS update testing

This change adds the following keywords to utils.robot:

Clear BMC Record Log
Copy PNOR to BMC
Flash PNOR
Get Flash BIOS Status
Is PNOR Flashing
Is PNOR Flash Done
Is System State Host Booted

This also adds test_bios_update.robot which implements a basic ipl test
using the above keywords.

Change-Id: Id544fd1cec755ef95eb7c7330751b3c2e2a2d9dc
Signed-off-by: Jay Azurin <jmazurin@us.ibm.com>
diff --git a/tools/generate_argumentfile.sh b/tools/generate_argumentfile.sh
index e51d973..5387beb 100755
--- a/tools/generate_argumentfile.sh
+++ b/tools/generate_argumentfile.sh
@@ -14,3 +14,4 @@
 echo "--variable SYSLOG_PORT:$SYSLOG_PORT" >> $ARG_FILE
 echo "--variable SSH_PORT:$SSH_PORT" >> $ARG_FILE
 echo "--variable HTTPS_PORT:$HTTPS_PORT" >> $ARG_FILE
+echo "--variable PNOR_IMAGE_PATH:$PNOR_IMAGE_PATH" >> $ARG_FILE