Add initial Packer definitions

Copy over the Packer definitions from ONOS since we've been asked to set
up the builders the same way initially.

Change-Id: I8c6e3cad05e4d4341ac58498d36810dac06f687f
Signed-off-by: Linux Foundation Administrators <collab-it+onlab@linuxfoundation.org>
diff --git a/packer/vars/.gitignore b/packer/vars/.gitignore
new file mode 100644
index 0000000..af92028
--- /dev/null
+++ b/packer/vars/.gitignore
@@ -0,0 +1,2 @@
+# exclude private cloud-env settings
+cloud-env.json