When creating the filter class name the last part is not capitalized.
So Swift::Storage::Filter::Healthcheck[bla] is named
Swift::Storage::Filter::healthcheck[bla]. Puppet don't detect the
syntax error as the resource is "created" within a string. But
puppetdb's parser do not let this work.
This fix it and adjust the tests.
Change-Id: If11c3ad0e98d14b9387b3daa4afeb118387100f8
Closes-Bug: #1252998