Revert "Drop Puppet 3.2 support"

This reverts commit 51d34b90a07c41f1b76caca7aaa8d07ccb473115.
Update refs for puppet nfs module

(remove last coma in operatingsystemrelease array)
Merge pull request #686 from enovance/puppet3.2

Re-introduce puppet 3.2 checks and update puppet-nfs refs