Fix beaker-based acceptance test-suite

.travis.yml

@@ -22,4 +22,4 @@ services: docker
 
 jobs:
   allow_failures:
-    - env: TARGET=acceptance RUBY_VERSION="2.5.1" BEAKER_setfile=spec/acceptance/nodesets/ubuntu-1604-x64.yml
+    - env: TARGET=acceptance RUBY_VERSION="2.5.1" BEAKER_setfile=spec/acceptance/nodesets/ubuntu-1604-x64.yml BEAKER_PUPPET_COLLECTION=puppet6

shell.nix

@@ -9,5 +9,6 @@ mkShell {
   shellHook = ''
     export PUPPET_INSTALL_TYPE=agent
     export BEAKER_setfile=spec/acceptance/nodesets/ubuntu-1604-x64.yml
+    export BEAKER_PUPPET_COLLECTION=puppet6
   '';
 }

spec/acceptance/nodesets/ubuntu-1604-x64.yml

@@ -1,8 +1,17 @@
 HOSTS:
-  ubuntu-16.04:
+  ubuntu-18.04:
     roles: [master]
     hypervisor: docker
-    platform: ubuntu-16.04-amd64
-    image: ubuntu:16.04
+    platform: ubuntu-18.04-amd64
+    image: ubuntu:18.04
+    dockeropts:
+      HostConfig:
+        PublishAllPorts: true
+        Privileged: false
+        RestartPolicy:
+          Name: always
+        PortBindings:
+          "22/tcp":
+            - { HostIp: '0.0.0.0', HostPort: '2223' }
 CONFIG:
   type: foss