testsuite: kernel oops without any reliable frame

Such an oops must be marked as not-reportable.

Signed-off-by: Jakub Filak <jfilak@redhat.com>
koops: don't drop not-reportable oopses by default

Introduce a new configuration option DropNotReportableOopses which holds
'FALSE' by default.

Resolves: rhbz#1022181

And provide general hints and tips for useless backtraces.

Related: rhbz#1084467

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Merge pull request #823 from abrt/rhbz1022181_unreliable_oops_frames

Don't drop not-reportable oopses by default