obmc_boot_test.py log cleanup:

- Separated out one-time setup from plug_in_setup and put it in
  initial_plug_in_setup.
- In both initial_plug_in_setup and plug_in_setup, added code to
  change log level to NONE and restore to saved value when finished.
  This is an attempt to remove irrelevant INFO traces.
- Change to validate pdu_slot_no only if pdu_host is provided.

Change-Id: I740a55e6cbff13db3c5a1abd6cc196e6d605ab95
Signed-off-by: Michael Walsh <micwalsh@us.ibm.com>
1 file changed