Add OS migration tests.

Update tests for "Refactoring: add OperationItem class."

Correct tests for "Check for deletion on new_position column."

Fix test for "Fix column mapping.".

Adapt tests to "Fix indexing.".

Update fixture objects in test. …

Access to fixture objects is done over a lookup table containing
the object's path, so won't work anymore after an object is moved
or it's title changed.

Add tests for individual operations in repository migration.

Add tests for migration preconditions.

Add tests for creation of repository folder in repository root.

Add tests for creation of repository folder in created repository fol… …

…der.

Add test for creation of repository folder in moved respository folder.

Add test to move a repository folder into a newly created one.

Add tests for moving a repository folder into the repository root.

Add test for moving a repofolder into a moved repofolder.

Add tests for migrator validation.

Add tests for validation of operations in RepositoryExcelAnalyser.

Update tests for also checking leaf node principle for created repofo… …

…lders.

Add tests for precondition checks of RepositoryMigrator.

Test that tasks get synced correctly during migration.

Add tests for permission update during migration.

Adapt tests for skipping invalid rows.

Add test for changing refnumber of child of moved repofolder.

Add tests for merging repofolder into another one.

Fix error logging tests.

Adapt os migration tests to new namings.

Adapt test assets to new Excel format and required completeness. …

We now also require that the migration excel is complete, i.e. all
positions are in the excel.

Adapt tests for new fields in the operations list.

Make sure tests are run in German. …

If the default language is english, now that we have an title_en
field, changing the title_de will not change the path anymore. So
we need to make sure to run the tests with "de" as default language.

Data inconsistency in catalog does not lead to migration failure anym… …

…ore.

Test that premissions also get set on already existing repofolders.

Test against new opengever.maintenance branch.

Update tests to accomodate new logging in repo migration script. …

When moving data extraction to its own method, we also added a new
logging entry. Dito when adding the new PositionsMapping.

Adapt tests to new error logged when parent position cannot be found.

Add test_repository_migrator_handles_temporary_dupplicate_position.

Adapt tests to new operation attributes. …

We also take that chance to improve maintainability of the tests
by extracting default values of the attributes in default_data.
This avoids a lot of repetition of these values in the tests so
that they don't have to be updated everywhere when attributes
change.

Correct metadata in excel files for repository migration tests.

Adapt tests to handling of metadata and permissions.

Add test that permissions are updated correctly.

Add test that refnum mapping is correct after OS migration.

Update repository migration tests to include old_parent_guid.

Switch opengever.maintenance branch back to master.