Remove trailing comma on class param list.
Remove trailing comma on class param list.

Puppet 2.6.17 (and probably lower) does not like them.

tiredpixel/puppet-redis,zapier/puppet-redis,thomasvandoren/puppet-redis,tiredpixel/puppet-redis,tiredpixel/puppet-redis,hypernova2002/puppet-redis,zapier/puppet-redis,hypernova2002/puppet-redis,craigcarnell/puppet-redis,zapier/puppet-redis,craigcarnell/puppet-redis,craigcarnell/puppet-redis,hypernova2002/puppet-redis