Fix adding VM IP addresses to NO_PROXY multiple times: for each vagrant provision
Fix adding VM IP addresses to NO_PROXY multiple times: for each vagrant provision

ndobson/kubernetes-vagrant-coreos-cluster,tcichowicz/kubernetes-vagrant-coreos-cluster,potgieterdl/kubernetes-vagrant-coreos-cluster,lrolaz/kubernetes-vagrant-coreos-cluster,v1k0d3n/kubernetes-vagrant-coreos-cluster,prashanthrv/kubernetes-vagrant-coreos-cluster,BitBldr/kubernetes-vagrant-coreos-cluster,RichardKnop/paas,geseib/kubernetes-vagrant-coreos-cluster,amannm/kubernetes-vagrant-coreos-cluster,schatt/kubernetes-vagrant-coreos-cluster,lrolaz/kubernetes-vagrant-coreos-cluster,ericjperry/kubernetes-vagrant-coreos-cluster,pires/kubernetes-vagrant-coreos-cluster