tests: fix unittest2 / unittest breakage

See https://bugzilla.redhat.com/show_bug.cgi?id=1161166

Signed-off-by: Richard Marko <rmarko@fedoraproject.org>
Add gen-version

Similar to the rest of ABRT projects, faf version now contains
number of commits after the last tag and short
commit hash of the last commit built e.g.:

faf-0.12.20.g0af7-1.fc20.noarch.rpm

Signed-off-by: Richard Marko <rmarko@fedoraproject.org>
Merge branch 'versioning'
Merge branch 'testfix'