Add translation support to service and utils modules

Added translations to files

 * sahara/service/direct_engine.py
 * sahara/service/edp/job_manager.py
 * sahara/service/volumes.py
 * sahara/utils/crypto.py
 * sahara/utils/general.py
 * sahara/utils/openstack/base.py
 * sahara/utils/openstack/neutron.py
 * sahara/utils/remote.py
 * sahara/utils/tempfiles.py
 * tox.ini

Change-Id: Idc4a1c7c4d6bfb2f25f33595dea7160dff4769cb
Merge "Add translation support to service and utils modules"