first version of the scanner working, but it is very buggy... need to be finished and tested.

Signed-off-by: Claudio Bisegni <Claudio.Bisegni@lnf.infn.it>
resolved conflict

Signed-off-by: Claudio Bisegni <Claudio.Bisegni@lnf.infn.it>

Conflicts:
	ChaosDataService/index_system/IndexDriver.h
	ChaosDataService/index_system/MongoDBIndexDriver.cpp
	ChaosDataService/index_system/MongoDBIndexDriver.h
	ChaosDataService/index_system/StageDataVFileScanner.cpp