With Karaf 3.0.4 we need everything to be in sync (${karaf.version},
SingleFeatureTest and AbstractConfigTestBase). This goes with
Ia6e719ab165586be25d664e226815c0df9478cd2.
Change-Id: I9da7721aa29e3f480e8bc35a57acbe77f89a70c4 Signed-off-by: Stephen Kitt <skitt@redhat.com>