Resolve packer template typo

Change-Id: Ie75900e7098a9cd87feeeb553a2910baef60e5ac
Signed-off-by: Mike Marchetti <mmarchetti@sandvine.com>
diff --git a/packer/ubuntu1604-ovf-osm.json b/packer/ubuntu1604-ovf-osm.json
index 64fa183..c2071a9 100644
--- a/packer/ubuntu1604-ovf-osm.json
+++ b/packer/ubuntu1604-ovf-osm.json
@@ -31,7 +31,7 @@
       "ssh_password": "vagrant",
       "ssh_port": 22,
       "ssh_wait_timeout": "10000s",
-      "shutdown_command": "echo '/sbin/shutdown -h -P now' > /tmp/shutdown.sh; echo 'vagrant'|sudo -S sh '/tmp/shutdown.sh'"
+      "shutdown_command": "echo '/sbin/shutdown -h -P now' > /tmp/shutdown.sh; echo 'vagrant'|sudo -S sh '/tmp/shutdown.sh'",
       "virtualbox_version_file": ".vbox_version",
       "vm_name": "{{user `vm_name`}}",
       "output_directory": "{{user `build_dir`}}",