fix undeclared $curl_prefix in localhost case (hopefully resolve test failure with Ruby 2.1.6)
fix undeclared $curl_prefix in localhost case (hopefully resolve test failure with Ruby 2.1.6)

voxpupuli/puppet-rabbitmq,Slm0n87/puppet-rabbitmq,Slm0n87/puppet-rabbitmq,firefly4268/puppetlabs-rabbitmq,synalabs/puppetlabs-rabbitmq,synalabs/puppetlabs-rabbitmq,puppetlabs/puppetlabs-rabbitmq,puppetlabs/puppetlabs-rabbitmq,fuel-infra/puppetlabs-rabbitmq,olevole/puppetlabs-rabbitmq,fuel-infra/puppetlabs-rabbitmq,DavidS/puppetlabs-rabbitmq,firefly4268/puppetlabs-rabbitmq,fatmcgav/puppetlabs-rabbitmq,Slm0n87/puppet-rabbitmq,fatmcgav/puppetlabs-rabbitmq,DavidS/puppetlabs-rabbitmq,voxpupuli/puppet-rabbitmq,olevole/puppetlabs-rabbitmq,gizmoguy/puppet-rabbitmq,gizmoguy/puppet-rabbitmq