Tmp patch until upstream blocking issue is fixed

We revert features of kamaki 0.13rc4, since we have
downgraded to 0.13rc3 until this one:

  https://github.com/grnet/kamaki/issues/73

is resolved and the fix published

Refs https://github.com/CELAR/SlipStreamConnector-Okeanos/issues/5
Refs https://github.com/grnet/kamaki/issues/73