Declare a generic rancher-node-.* hostname matching
Declare a generic rancher-node-.* hostname matching

It will avoid to update puppet each time we will add
new rancher nodes to a cluster

Related to T4221

SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site