Add beaker test to module

spec/acceptance/nodesets/default.yml

@@ -0,0 +1,15 @@
+HOSTS:
+  debian-8-x64:
+    platform: debian-8-amd64
+    hypervisor: docker
+    image: debian:8
+    docker_container_name: puppet_rsnapshot
+    docker_preserve_image: true
+    docker_cmd: '["/sbin/init"]'
+    docker_image_commands:
+      - 'echo deb http://ftp.debian.org/debian jessie-backports main >> /etc/apt/sources.list'
+      - 'apt-get update && apt-get install -y cron locales-all net-tools wget'
+      - 'rm -f /usr/sbin/policy-rc.d'
+CONFIG:
+  trace_limit: 200
+  masterless: true