This patch make some modifications on iofuzz:
1. When session is not response, check whether qemu or guest kernel
   crash occurs.
2. Check whether qemu or guest kernel crash occurs after fuzz test.
3. Make the script follow pep8 rules
4. enable image snapshot.
Signed-off-by: NYunping Zheng <yunzheng@redhat.com>

During the review of the repository split, it was pointed
out that 'agnostic' was a rather strange word, so we'll go
with 'generic'. I opted for not rebasing the PR, since I
had many problems when trying to do so.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

This will make it easier when we're splitting these
tests into their own repositories.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

We've only spot this mistake now :(
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

In order to have self describing tests, split the original
subtests.cfg in several per test files, and create subtests.cfg
out from this information.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>