added environment files

templates/base-autofs/environment.yml

+environment:
+  base_image: "base-ntp"
+  vm_name: base-autofs
+  build_output_directory: builds
+  ssh_username: root

templates/base-ill/environment.yml

+environment:
+  proxy: http://proxy.ill.fr:8888
+  no_proxy: localhost,127.0.0.1,apt.ill.fr,*.ill.eu,*.ill.fr
+  dns_servers: 195.83.126.2 195.83.126.11
+  gateway: 192.168.180.254
+  cpus: 2
+  memory: 4096
+  disk_size: 40000
+  ubuntu_mirror: http://archive.ubuntu.com/ubuntu/dists
+  ubuntu_codename: bionic
+  ubuntu_docker_image: ubuntu:18.04
+  preseed_file_name: preseed-base-ill.cfg
+  ssh_username: root
+  user: si-admin
+  user_fullname: si-admin
+  build_output_directory: builds

templates/base-ntp/environment.yml

+environment:
+  base_image: base-ill
+  vm_name: ill-ntp
+  build_output_directory: builds
+  ssh_username: root
+