Removes trailing whitespace

A number of files contained trailing whitespace, this has been removed
with the following perl one-liner.

perl -pi -e 's/ +$//' *

Not having whitespace prevents confusing diff outputs such as the
following.

https://github.com/jhoblitt/puppet-ganglia/pull/3#discussion-diff-7579522

The diff changes on the PR may seem a bit crazy with blocks seemingly removed and re-added but if you view with the following URL or do `git diff --ignore-space-at-eol` you'll see it's just space removal.

https://github.com/jhoblitt/puppet-ganglia/pull/20/files?w=1