Add require on apt::update for puppetlabs-apt 2.x
Add require on apt::update for puppetlabs-apt 2.x

This problem doesn't always happen.  I'm unable to reproduce when
just declaring class {'sensu':} by itself.  However, it does seem
to happen when declared in a profile with other classes that use
puppetlabs-apt.  My best guess is that once one of the other
classes triggers an apt-get update, another one doesn't happen
within the same run.  In any case, the official puppetlabs-apt
docs now state that one's package resource must have an explicit
dependency on class apt::update if you expect things to work in one
run:
https://github.com/puppetlabs/puppetlabs-apt#adding-new-sources-or-ppas

Change-Id: I14ff923ec87cc45f4e845d043b4bf7fca7e11c00

somic/sensu-puppet,meltwater/sensu-puppet,jlambert121/sensu-puppet,sensu/sensu-puppet,madelaney/sensu-puppet,bodgit/sensu-puppet,dhgwilliam/sensu-puppet,RiRa12621/sensu-puppet,bodgit/sensu-puppet,modax/sensu-puppet,br0ch0n/sensu-puppet,mmickan/sensu-puppet,jaxxstorm/sensu-puppet,RiRa12621/sensu-puppet,dzeleski/sensu-puppet,dzeleski/sensu-puppet,wywygmbh/sensu-puppet,modax/sensu-puppet,RiRa12621/sensu-puppet,smithtrevor/sensu-puppet,wywygmbh/sensu-puppet,thanandorn/sensu-puppet,mmickan/sensu-puppet,dhgwilliam/sensu-puppet,mmickan/sensu-puppet,somic/sensu-puppet,jeffmccune/sensu-puppet,rabidsloth/jenkins_test,wywygmbh/sensu-puppet,thanandorn/sensu-puppet,jlambert121/sensu-puppet,bovy89/sensu-puppet,opentable/sensu-puppet,cybera/sensu-puppet,smithtrevor/sensu-puppet,bovy89/sensu-puppet,jeffmccune/sensu-puppet,smithtrevor/sensu-puppet,somic/sensu-puppet,cybera/sensu-puppet,opentable/sensu-puppet,modax/sensu-puppet,rabidsloth/jenkins_test,cybera/sensu-puppet,meltwater/sensu-puppet,meltwater/sensu-puppet,thanandorn/sensu-puppet,dhgwilliam/sensu-puppet,opentable/sensu-puppet,jaxxstorm/sensu-puppet,sensu/sensu-puppet,jlambert121/sensu-puppet,sensu/sensu-puppet,bovy89/sensu-puppet,dzeleski/sensu-puppet,madelaney/sensu-puppet,rabidsloth/jenkins_test,bodgit/sensu-puppet,jaxxstorm/sensu-puppet,br0ch0n/sensu-puppet,madelaney/sensu-puppet,br0ch0n/sensu-puppet,jeffmccune/sensu-puppet