private MongoDBGlobalMetadataConnector (){
        MONGOCLIENT = new MongoClient( "localhost" , 27017 );
        MONGODATABASE = MONGOCLIENT.getDatabase("MetaLakeTest");//.getDatabase("MetaLake");
        GDMENTITYDATABASE = MONGOCLIENT.getDatabase("entities");
        GDMONTOLOGYDATABASE = MONGOCLIENT.getDatabase("ontologies");
        MONGOCOLLECTION = MONGODATABASE.getCollection("GlobalMetadata");
        ENTITIESMONGOCOLLECTION = MONGODATABASE.getCollection("entities");
        ONTOLOGIESMONGOCOLLECTION = MONGODATABASE.getCollection("ontologies");
    }