python2 fix for import StringIO
python2 fix for import StringIO

Change-Id: I26854df584f316dedafbd7e0899acb0fa4555b2f
Signed-off-by: Michael Walsh <10404802c7de463f402c4a18638106ca1b12ef61@us.ibm.com>

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