Allow ssh from ls.test to ls.ext
Allow ssh from ls.test to ls.ext

To be able to run commands directly on ls.ext from tests, e.g. to reindex.
For now, must disable host identity checking.
Example:
  ssh -i ~/.ssh/insecure_private_key -o StrictHostKeyChecking=no -o PasswordAuthentication=no vagrant@192.168.50.10 -c <command>

digibib/ls.ext,digibib/ls.ext,digibib/ls.ext,digibib/ls.ext