Add support for RandomSleep to 10periodic

[bschlief]

This is a refresh of the merge request as proposed by @frankatwork in #308. It incorporates the review comments by @daenney.

[daenney]

This looks good. However, on the template I would prefer not a single line but:

<%- unless @randomsleep.nil? -%>
APT::Periodic::RandomSleep "<%= @randomsleep %>";
<%- end -%>

The %- will remove unnecessary white space and the thing becomes a bit more readable as a result of being split over a few lines.

unless is the 'nicer' way of doing if not (which also works in Puppet DSL by the way).

[bschlief]

Terrific! I'll make those changes and squash the commits together. Great tip about "<%-". I hadn't seen that before.

[daenney]

Thanks. I forgot one thing, I'd appreciate an entry in the README about this parameter and a small explanation about it. Look at line 278 and below.

[bschlief]

Sure! I updated it. Should have come up with that on my own. For shame! :)

[daenney]

Thanks you for you contribution!