Problem: AM doesn't have a notion of public URL

[sevein]

The self-registration process that AM performs against SS (during the installation) is sometimes insufficient because the pipeline details does not include an accessible URL so SS can reach the pipeline.

The request made by storageService during the registration is similar to the one produced with the following command:

curl -s -d '{
        "uuid": "99354557-9e6e-4918-9fe3-a65b00ecb199",
        "description": "Test pipeline",
        "create_default_locations": true,
    }' \
        -X POST \
        -H "Authorization: ApiKey test:test" \
        -H "Content-Type: application/json" \
            "http://127.0.0.1:8000/api/v2/pipeline/"

The remote_name value is not used. When unset, SS populates that property after the value found in the REMOTE_ADDR HTTP header - this is okay as a fallback but we want AM to learn a new site_url setting that the user can set. This value would be used during the self-registration process.

In RDSS, this was solved differently. See JiscSD/archivematica-storage-service#22. for more details.

[sromkey]

This is connected to #1142 and since the setting is very much there (under Administration, General) I'm calling this verified!

[sromkey]

Whoops, jumped the gun, we still need to document this! Assigning myself.

[sallain]

Documented and added to release notes.