elasticsearch: virtualenv support
elasticsearch: virtualenv support

* When developing and using honcho to start elasticsearch, executes
  elasticsearch by storing indexes and logs within the local virtual
  environment.

Signed-off-by: Samuele Kaplun <2e218f779e12714c314fad8ebf6b3041daa21337@cern.ch>

tiborsimko/invenio,tiborsimko/invenio,inveniosoftware/invenio,inveniosoftware/invenio