Install lua-sec-prosody package on Debian Wheezy and Ubuntu Precise
This is the updated version from the prosody repository because
these distributions have an old version of the lua-sec package
that lacks PFS and other features. Second commit for issue #285.
* Postfix: Trusty comes with postgresql 9.3, not 9.1
* owncloud 6.0.1 is part of the distribution, doesn't require opensuse repository
* owncloud requires libapache2-mod-php5
* uses prosody repository that matches the ansible_distribution_release (trusty, wheezy, etc)