Removed the success filter from DSO data response so that all responses are returned, including 404.

Converted id to const.

Added matcher function to router that supports handle paths (eliminates the need to encode the forward slash).

Fixed comment.

Fixed unit tests.

Updated to use pid REST endpoint.

Minor change in data.service and unit test update.

Updated the objectnotfound page with new text and go home button.

Item-Collection mapper

[DS-4346] V2: create docker compose files in code base

Small bug-fix due to changes to relationship-type

Rename relationship type properties