Move CI vars out of gitlab and into var files (#1808)

tests/files/coreos-canal.yml

@@ -0,0 +1,13 @@
+# Instance settings
+cloud_image: coreos-stable
+cloud_region: us-east1-b
+mode: default
+startup_script: 'systemctl disable locksmithd && systemctl stop locksmithd'
+
+# Deployment settings
+kube_network_plugin: canal
+bootstrap_os: coreos
+resolvconf_mode: host_resolvconf # this is required as long as the coreos stable channel uses docker < 1.12
+deploy_netchecker: true
+kubedns_min_replicas: 1
+cloud_provider: gce