Revert "[Libraries] enh: get rid of akka."
Revert "[Libraries] enh: get rid of akka."

This reverts commit cb87e7a7ffd9e5b1246e0d0fb6559ae9057fea95.

openmole/openmole,openmole/openmole,openmole/openmole,openmole/openmole,openmole/openmole