Should provide cleanup strategies to control what needs to be removed for the given test

Provide following cleanup strategies:

• STRICT (implemented currently) - Cleans whole database content (using DELETE_ALL). Might require turning off database constraints (e.g. referential integrity).
• USED_ROWS_ONLY - Deletes only those entries which were defined in data sets.
• USED_TABLES_ONLY - Deletes only those tables which were used in data sets.