bug in FMD retrieve

[belforte]

this line https://github.com/dmwm/CRABServer/blob/20aaf162e334451db4a74d88e790995892fe47be/src/python/CRABInterface/DataFileMetadata.py#L68 is likely broken since ever and surely makes no sense

It should be

 'created': str(row.created), 

where row.created is an object of type datetime

Now it returns instead a CRABInterface.RESTBaseAPI._FakeLOB object which makes it impossible to compare different ways of retrieving FMD since it is a pointer to a location in memory.

Clearly this value is never used in python code. It indicates the time the row was inserted in the DB and AFICT it is only used in these SQL queries https://github.com/dmwm/CRABServer/blob/20aaf162e334451db4a74d88e790995892fe47be/src/python/Databases/FileMetaDataDB/Oracle/FileMetaData/FileMetaData.py#L112-L113 which are activated by an HTTP call with delete method https://github.com/dmwm/CRABServer/blob/20aaf162e334451db4a74d88e790995892fe47be/src/python/CRABInterface/RESTFileMetadata.py#L110-L113

https://github.com/dmwm/CRABServer/blob/20aaf162e334451db4a74d88e790995892fe47be/src/python/CRABInterface/DataFileMetadata.py#L134-L144

used in https://github.com/dmwm/CRABServer/blob/master/src/python/TaskWorker/Actions/Recurring/FMDCleaner.py which we do not run anymore.

All of this is likely obsolete since we user partitions and partition dropping to cleanup the DB.