Update params.pp to support Redhat/Centos >= 6.4
Update params.pp to support Redhat/Centos >= 6.4

In the latest versions of OpenVPN the easy-rsa suite is not present anymore in the package.
Instead one should separately install the easy-rsa package from EPEL.

jlambert121/luxflux-openvpn,earsdown/puppet-openvpn,jlambert121/luxflux-openvpn,dominikschulz/puppet-openvpn,luxflux/puppet-openvpn,to-kn/puppet-openvpn,earsdown/puppet-openvpn,dennisdegreef/puppet-openvpn,wywygmbh/puppet-openvpn,jkroepke/puppet-openvpn,rfletcher/puppet-openvpn,rfletcher/puppet-openvpn,jkroepke/puppet-openvpn,jlambert121/luxflux-openvpn,luxflux/puppet-openvpn,rfletcher/puppet-openvpn,wywygmbh/puppet-openvpn,mayflower/puppet-openvpn,wywygmbh/puppet-openvpn,jkroepke/puppet-openvpn,earsdown/puppet-openvpn,to-kn/puppet-openvpn,luxflux/puppet-openvpn,gwdg/puppet-openvpn,dennisdegreef/puppet-openvpn,to-kn/puppet-openvpn,mayflower/puppet-openvpn,rchicoli/puppet-openvpn,rchicoli/puppet-openvpn,rchicoli/puppet-openvpn,dennisdegreef/puppet-openvpn,mayflower/puppet-openvpn