bump concat dependency to 2.X
bump concat dependency to 2.X

this uses the new native type + provider. The legacy defined type setup
shouldn't be used anymore.

tux-o-matic/puppet-zabbix,voxpupuli/puppet-zabbix,voxpupuli/puppet-zabbix,tux-o-matic/puppet-zabbix,tux-o-matic/puppet-zabbix,voxpupuli/puppet-zabbix