Make regression test more robust

Expect was failing periodicallly due to apparent timing problems
cpu/mem_bind fix

Fix for --cpu_bind=map_cpu/mask_cpu/map_ldom/mask_ldom plus
--mem_bind=map_mem/mask_mem options, broken in 2.6.2.
See commit 718382da0d44fdea9f0151662def62c17637de05