various fixes for ansible 2.3 compat
update docker role
set default for docker apt repo
fix quote
revert explicit dependencies, use ansible_user_id rather than ansible_user
don't depend on ansible role
force docker version

Change-Id: I0ba24d829db73559d7d4f16ae89a4661215f3842
diff --git a/prime-node.yml b/prime-node.yml
index 79553a5..7aaa324 100644
--- a/prime-node.yml
+++ b/prime-node.yml
@@ -1,4 +1,14 @@
-- hosts: all
-  serial: 1
+---
+# instal docker and docker registry on head node
+
+- name: run setup to gather facts
+  hosts: all, localhost
+  tasks:
+    - name: run setup
+      setup:
+
+- name: install docker registry
+  hosts: head
   roles:
     - registry
+