remove error datasets from schema

For the original implementation of Error datasets I added them
to the schema with an assoc table and a DAO to insert into that
table. As it turned out, the actual final implementation does
not use this, therefore remove the table from the schema and
all associated code.
add OfflineConfigs

add example OfflineConfig files for prod and replay
Merge pull request #4043 from hufnagel/offlineconfigs

add OfflineConfigs
Merge pull request #4041 from hufnagel/errordatasetschema

remove error datasets from schema