Changes

tsk8: Fixes missing dataset location and adds cleanup scripts for REST
tests
This commit fixes a dataset resolution error in the REST integration
tests for the
/api/microstories/recents endpoint. The Arquillian persistence extension
was unable to locate stories.xml, so the dataset file was moved to the
datasets/ directory, matching the framework’s default lookup path.
Additionally, a cleanup.sql script was introduced to clear test tables
between executions, ensuring isolation and preventing residual data
issues.