Make igtrc configuration common, with configurable suspend/resume delay

This adds support for configurable suspend/resume delay and takes the
occasion to move igtrc configuation from igt_chamelium to igt_core.
This way, suspend/resume delay configuration can be used for all tests.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@linux.intel.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
9 files changed