The parent ticket T49 requires we consider either to not ship iRony-0.4 series and roundcubemail-plugins-kolab-3.3 series to Kolab:Development as they require PHP >= 5.4, or have Kolab:Development (and therefore Kolab:3.5) require PHP >= 5.4.
The latter option will entail dropping platform support for Kolab:Development and Kolab:3.5 for those platforms that ship PHP < 5.4: Enterprise Linux 6, Debian Squeeze, Ubuntu 12.04 LTS (Precise), UCS 3.0, UCS 3.1 and UCS 3.2.
NOTE: this problem does not affect enterprise editions, where we are at liberty to choose to ship our own PHP version.