create: Fix unit test for new runtime spec
create: Fix unit test for new runtime spec

Limits are no longer unsigned ints.

Signed-off-by: Samuel Ortiz <0ba86cb3f08bbb861958e54bd3438887adb4263c@linux.intel.com>

chavafg/runtime,clearcontainers/runtime,chavafg/runtime,clearcontainers/runtime,devimc/runtime,devimc/runtime