mergetables/Tests/doubletable.sql: fixed test to properly clean-up and thus not harm subsequent tests
mergetables/Tests/doubletable.sql: fixed test to properly clean-up and thus not harm subsequent tests


(We highly recommend to actually run tests and run all tests in the same directory
 when adding or activating new tests and check that the newly added/activated tests
 do not harm older existing tests --- before committing and pushing your changes ...)

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb