execute_ssh_command convert parms to int
execute_ssh_command convert parms to int

This makes the function easier to use by robot programs

Change-Id: Iffd8657bcdac214cb13ec7bba6e86b28f4e6602f
Signed-off-by: Michael Walsh <10404802c7de463f402c4a18638106ca1b12ef61@us.ibm.com>

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