resulttool/manualexecution: Fixed step sorted by integer
Currently the manual execution display step by sorting
the step as string, where steps were not being sorted
correctly when there are more than 9 steps.
Fixed the step sorting by sorting step as integer.
Signed-off-by: Yeoh Ee Peng <ee.peng.yeoh@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> Signed-off-by: Armin Kuster <akuster808@gmail.com>