Add packer scripts for vagrant image generation

Change-Id: If163c456b756f6c7c8a7a197dabc8eb3b1fc7907
Signed-off-by: Mike Marchetti <mmarchetti@sandvine.com>
diff --git a/packer/scripts/juju-setup.sh b/packer/scripts/juju-setup.sh
new file mode 100755
index 0000000..55752e5
--- /dev/null
+++ b/packer/scripts/juju-setup.sh
@@ -0,0 +1,2 @@
+#!/bin/sh
+sudo snap install juju --classic