Maint/master/switch to packaging repo

This PR shifts puppetdb to using the packaging repo for packaging. It removes the built-in packaging methods/tasks. It adds tasks for cloning and removing the packaging repo. The scripts for building packages for acceptance are updated to use the packaging repo and its output format. It updates the redhat packaging artifact template to remove OS-specific (mostly ruby lib path) templating done in the srpm, instead opting for using built-in redhat spec macros, so that we do not require OS-specific srpms, simplifying building. The terminus package for both redhat and debian is updated to explicitly own its files rather than everything in the puppetlib dir. This PR should not be merged until after the release of 1.1.0.