EventBookkeeperTools: Check whether FileMetaData is present before retrieve ATLASRECTS-6872
Attempting to retrieve an object that does not exist generates a WARNING. To avoid this, check whether the InputMetaDataStore contains a FileMetaData object before attempting to retrieve it.
If the InputMetaDataStore does not contain a FileMetaData object to determine the input dataType from, attempt to determine it from the EventStreamInfo.
Edited by Frank Berghaus