init.common: Create dhclient file if needed
init.common: Create dhclient file if needed

On redhat/centos, the file didn't existed and lead to an error making
everything exiting.

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