CORD-1551 - updated maas makefiles and multi-stage dockerfile

Change-Id: I0bab86e0207edb12f553ddcfe040882f04f34f25
diff --git a/roles/ssh-key/defaults/main.yml b/roles/ssh-key/defaults/main.yml
new file mode 100644
index 0000000..309b31c
--- /dev/null
+++ b/roles/ssh-key/defaults/main.yml
@@ -0,0 +1,2 @@
+---
+pub_ssh_key_file_location: "{{ pub_ssh_key_location | default ('/etc/maas/.ssh') }}"