add parallel gem for spec tests
add parallel gem for spec tests

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