This is the port of the legacy/kernel/test_critical test case to
the unified kernel, and to use the ztest framework
Change-Id: I10834cbb51446b4a12fc680c0b65438d550f4d85
Signed-off-by: Sergio Rodriguez <sergio.sf.rodriguez@intel.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>