Authentication issue when attempting to install sensu package

[jlk]

Howdy! When attempting to install sensu on Ubuntu via the sensu-puppet module, it's failing as the repository data hasn't been updated between the apt key being added and the attempt to install the sensu package:

==> default:
==> default: Error: /Stage[main]/Sensu::Package/Package[sensu]/ensure: change from purged to latest failed: Could not update: Execution of '/usr/bin/apt-get -q -y -o DPkg::Options::=--force-confold install sensu' returned 100: Reading package lists...
==> default: Building dependency tree...
==> default: Reading state information...
==> default: The following NEW packages will be installed:
==> default:   sensu
==> default: 0 upgraded, 1 newly installed, 0 to remove and 125 not upgraded.
==> default: Need to get 21.2 MB of archives.
==> default: After this operation, 60.8 MB of additional disk space will be used.
==> default: WARNING: The following packages cannot be authenticated!
==> default:   sensu
==> default: E: There are problems and -y was used without --force-yes

Relevant part of my manifest looks like this:

class { 'sensu':
  rabbitmq_password  => 'sensu',
  server             => true,
  install_repo       => true,
  repo_source        => 'http://repositories.sensuapp.org/apt',
  repo_key_source    => 'http://repositories.sensuapp.org/apt/pubkey.gpg',
  repo_key_id        => '',
  api                => true,
  require            => Package['ruby-dev'];
}

Looks like adding a few lines in manifests/repo/apt.pp would straighten this out. Will tinker with that idea and submit a pull request if I get it working...