service: allow to disable core check

service: allow to disable core check

This commit adds a new function to disable the runtime mapped
service-cores check. This allows an application to take responsibility
of running unmapped services.

This feature is useful in cases like unit tests, where the application
code (or unit test in this case) requires accurate control over when
the service function is called to ensure correct behaviour, and when
an application has an advanced use-case and wishes to manage services
manually.

Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
Acked-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>