Change release number in test.spec for testing purposes

Signed-off-by: Tomas Hozza <thozza@redhat.com>
Use .format() for string instead of concatenation

Signed-off-by: Tomas Hozza <thozza@redhat.com>
SpecFile: improve some doc texts

Signed-off-by: Tomas Hozza <thozza@redhat.com>
Change the Release when setting extra_version

Signed-off-by: Tomas Hozza <thozza@redhat.com>