Enable support for IPMI SOL.
Enable support for IPMI SOL.

This changes includes:
   - Added keywords to activate and deactivate SOL via IPMI.

Resolves openbmc/openbmc-test-automation#411

Change-Id: I562fa4c5a619fa9cbba318adb8d67fd06a386024
Signed-off-by: Rahul Maheshwari <a806e6fd77e56dd64ff6084a06bbf3a5a70392ef@in.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation