Fix VM boot: make kernel cmdline use predictable net names

G5K environments since 20190417 configure ens3 instead of eth0 in /etc/network/interfaces

kameleon/kameleon-recipes/from_kadeploy_environment/debian9-x64-custom.yaml

@@ -52,8 +52,8 @@ global:
   # enable workaround for the login delay due to ldap and dns
   enable_workaround_login_delay: true
 
-  # kernel boot parameters: use legacy network interfaces
-  kernel_args: "quiet net.ifnames=0 biosdevname=0"
+  # kernel boot parameters
+  kernel_args: "quiet"
 
   ssh_config_file: $${kameleon_cwd}/ssh_config
   local_ip: 10.0.2.2