common: remove the DNS configuration
common: remove the DNS configuration

Drop /etc/resolv.conf content, this to avoid the case the nameserver is
only reachable by the host used to build the image.

redhat-cip/edeploy,lebauce/edeploy,lebauce/edeploy,lebauce/edeploy,enovance/edeploy,redhat-cip/edeploy,enovance/edeploy,redhat-cip/edeploy,enovance/edeploy,lebauce/edeploy,redhat-cip/edeploy,enovance/edeploy