(maint) fix dsc:resources:clean Rake task
(maint) fix dsc:resources:clean Rake task

 - Was removing wrong folder
 - Also fix minor message incorrectness

cowofevil/puppetlabs-dsc,Iristyle/puppetlabs-dsc,jpogran/puppetlabs-dsc,puppetlabs/puppetlabs-dsc,puppetlabs/puppetlabs-dsc,ConclusionMC/puppetlabs-dsc,ConclusionMC/puppetlabs-dsc,ferventcoder/puppetlabs-dsc,jpogran/puppetlabs-dsc,ferventcoder/puppetlabs-dsc,ConclusionMC/puppetlabs-dsc,Iristyle/puppetlabs-dsc,ferventcoder/puppetlabs-dsc,cowofevil/puppetlabs-dsc,cowofevil/puppetlabs-dsc,Iristyle/puppetlabs-dsc,puppetlabs/puppetlabs-dsc,jpogran/puppetlabs-dsc,ferventcoder/puppetlabs-dsc,ConclusionMC/puppetlabs-dsc,ConclusionMC/puppetlabs-dsc,Iristyle/puppetlabs-dsc