Cleanup apache sample config of Sliceable Switch

- Accept REST paths conforming to Sliceable Network Management API
  (e.g., /tenants/tenant-1/networks/network-1)
- Make the script dir "deny from all" to avoid unnecessary expose.
- Replace tab to spaces
Merge pull request #18 from amotoki/ss-apache-conf

Cleanup apache sample config of Sliceable Switch