add support for ubuntu vivid (15.04) using openjdk-8

add acceptance test node without really understanding what it does.
add test for distribution type jdk for Ubuntu vivid

spec/acceptance/nodesets/ubuntu-server-1504-x64.yml

@@ -0,0 +1,11 @@
+HOSTS:
+  ubuntu-server-1504-x64:
+    roles:
+      - master
+    platform: ubuntu-15.04-amd64
+    box : puppetlabs/ubuntu-15.04-64-nocm
+    box_url : https://vagrantcloud.com/puppetlabs/ubuntu-15.04-64-nocm
+    hypervisor : vagrant
+CONFIG:
+  log_level   : debug
+  type: git