Parallelize deb_all and mock_all in jenkins

Currently our jenkins deb_all and mock_all jobs build targets serially. This
commit changes this to build targets in parallel, by posting separate jobs to
jenkins for each target, allowing jenkins to queue. This does introduce n*cows
+ n*mocks increase in data upload, but in a high-bandwidth, large storage world
this is still a major optimization.

Signed-off-by: Moses Mendoza <moses@puppetlabs.com>
Sleep uber tasks to avoid jenkins dropping jobs

When jenkins things we're DOSing it by posting to the same job 5 times in 2
seconds, it drops some of the jobs. In repeated testing, sleep 5 was the
shortest amount of time in which no jobs were dropped during the newly
parallelized mock_all and deb_all, so it stands to reason that the same would
apply to the uber tasks.

Signed-off-by: Moses Mendoza <moses@puppetlabs.com>
Merge pull request #110 from MosesMendoza/maint/master/parallelize

Maint/master/parallelize