(MCO-179) Remove reference to package iteration in #package_information

When the iteration flag was renamed and deprecated one reference to it
remained in OspackagePackager#package_information.

This commit removes the last reference to iteration.
Merge pull request #161 from ploubser/bug/master/mco-173

(MCO-179) Remove reference to package iteration in #package_information
maint - update changelog
(packaging) Update buildrequires for rhel7

The systemd-units package is not available on rhel7, so this commit moves rhel7
and later into the same BuildRequires as f18 and later.
Merge pull request #163 from haus/maint/2.4.x/rhel7_fix

(packaging) Update buildrequires for rhel7
Merge branch '2.4.x'
(MCO-180) Release 2.4.1
maint - fix release notes