Better precondition checking in the test suite

1. auto-load einj module before apei test begins and update APEI_IF
   definition to a proper place
2. fix typos in the check_debugfs
3. enhance the module check before stress test

Signed-off-by: Chen Gong <gong.chen@linux.intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
3 files changed