(packaging) Use the packaging loader for tasks

The packaging repo now uses an explicit loader which handles loading the
various rake tasks in packaging. This commit updates the puppetdb Rakefile to use
the loader instead of a blind glob of the ext/packaging/tasks directory. We
move this load into the rescue LoadError block because the packaging repo won't
always be there.

Signed-off-by: Moses Mendoza <moses@puppetlabs.com>
(packaging) Remove Ubuntu Oneiric, add Raring

Oneiric is EOL, and we are no longer building for it. This commit removes the
Oneiric target from the build list for puppet. We also now build for Raring
Ringtail, so we add this to targets.

Signed-off-by: Moses Mendoza <moses@puppetlabs.com>
Merge pull request #540 from MosesMendoza/maint/master/remove_oneiric

(packaging) Remove Ubuntu Oneiric, add Raring
Merge pull request #541 from MosesMendoza/maint/master/add_loader

(packaging) Use the packaging loader for tasks
Merge pull request #542 from kbarber/port_option_coerce_to_integer

Coerce -p values for export/import cli to Integer
(maint) Remove oneiric, add raring to puppetdb build_deb shell script.
Merge pull request #544 from haus/update_build_deb_sh

(maint) Remove oneiric, add raring to puppetdb build_deb shell script.
Add anon option

Signed-off-by: Ken Barber <ken@bob.sh>