refactoring of the default name
of chaos database on mongodb and now, the name
is got from configuration if is gived
Merge pull request #48 in CHSBNDL/chaosframework from vif_refactory_mongodb_name to development

* commit '275ba1e990b58f57a763a6250cbf4df9b699eb75':
  refactoring of the default name of chaos database on mongodb and now, the name is got from configuration if is gived