CPU migration test: one task is migrated
CPU migration test: one task is migrated

Add a test where one task is migrated and check that
the utilization of the CPUs are updated accordingly.

Signed-off-by: Elieva Pignat <44a5274bcc440d4777a3c4474202e15e583e8208@arm.com>

ARM-software/lisa,ARM-software/lisa,ARM-software/lisa,credp/lisa,credp/lisa,credp/lisa,ARM-software/lisa,credp/lisa