Added try/except support to run_key.
Added try/except support to run_key.

Change-Id: Id4da1c8bc0205fa2a8a2a7ca9ff11636b1d4ad45
Signed-off-by: Michael Walsh <10404802c7de463f402c4a18638106ca1b12ef61@us.ibm.com>

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