AnalysisTop: Fix reading metadata in AodMetaDataReader.py
This fixes a bug in
AodMetaDataReader.py that reads some metadata from MetaData tree in derivations which we need at a later stage.
The bug stems from the fact that, we re-create a portion of the class
IOVPayloadContainer only available in athena to be able to read the metadata in AnalysisBase. The corresponding
AttrListTypes enum was wrongly implemented, causing wrong determination of data type of the attribute being read.