distrobaker must handle packages with autochangelog

[keszybz]

People will be generally unhappy if their authorship information is stripped when packages are imported from Fedora to RHEL. Many packages in Fedora are using rpmautospec, hence $subject.

(I didn't look into the details, but in general: If RHEL wants to use hand-managed changelogs, the changelog should be exported using rpmautospec generate-changelog. If RHEL wants to use %autochangelog if the Fedora package does that, then nothing needs to be done except a proper commit message. If RHEL wants to use %autochangelog in all cases, then rpmautospec convert is the tool of choice to do the conversion.)