Refactor to reduce complexity and have uniform handling of enums.

Type available as query parameter instead of path parameter.
Update signature to   /children/{uuid}.
Update signature from /children/{type}/{uuid}.

Fix issue for retrieve by name/uuid. Uuid with valid format but non-existing.
Fix issue for retrieve structure by parent uuid. No parent uuid for system group, discipline.
Add url encoding by default for integration tests.
Add and update integration tests for names and structures.

Use parameters one-by-one instead of arrays.
Purpose to improve usability.

Update test utility methods including order of parameters.
Refactor integration tests.

Refactor integration tests.
Allow for test of array of objects.

Application will generate uuid.
Update validation to not allow value for uuid when create names and structures.
Update integration tests.

Declarations should use Java collection interfaces such as "List" rather than specific implementation classes such as "LinkedList"
Empty statements should be removed
JUnit assertTrue/assertFalse should be simplified to the corresponding dedicated assertion
JUnit5 test classes and methods should have default package visibility
Methods and field names should not be the same or differ only by capitalization
Nested "enum"s should not be declared static

Update REST API with response codes for endpoints.
Set http status codes corresponding to exceptions.

Rename package for beans.
Remove unused beans.

Update and add tests-

Purpose of Naming to (default) show valid entries.
Therefore exclude some values unless history requested.
Make sure to not exclude present and future values.

Change functions for mnemonic path for system, subsystem.
Change and add to docker integration tests.

Purpose to improve clarity and prepare for easier testing of REST API.

Allow one pending entry for uuid, mnemonic, mnemonic equivalence.
Update validation to consider status together with mnemonic, mnemonic validation.
Multiple pending entries per uuid no longer allowed.

Update docker integration tests accordingly.

Correct docker integration tests for structures for delete approve.
Refactor docker integration tests.

Updated validation of mnemonic rules for structures and added docker integration tests for REST API endpoints for structures