If bash test script uses a pattern that test that command should fail
command && fail
(IOW fail function is called only if command exited successfully),
it can mask potential segfault, as it return non-zero exit code.
Fix it by using trap for scripts that uses this pattern.
The same applies for SIGABRT (abort() call).
Skip tests that can not satisfy minimal test passphrase length:
- empty passphrase
- LUKS1 cipher_null tests (empty passphrase is mandatory)
- LUKS1 encryption
