missing or wrong backend discoveryConfiguration

[floriangantner]

Describe the bug
Both
https://github.com/4Science/dspace-angular/blob/359ddec66158e33721f57c34fd210a4adb111cca/src/app/shared/dso-selector/modal-wrappers/import-batch-selector/import-batch-selector.component.ts#L19
and
https://github.com/4Science/dspace-angular/blob/359ddec66158e33721f57c34fd210a4adb111cca/src/app/shared/dso-selector/modal-wrappers/export-batch-selector/export-batch-selector.component.ts#L33
reference the backend search discovery configuration, which is not part in the discovery configuration map (anymore).

To Reproduce

Expected behavior
we expect the backend configuration to be exist in the map. Or the configuration to be changed. Now the default Configuration should be returned instead.

This was part of the mapping before the merge with 7.6
https://github.com/4Science/DSpace/blame/8b0fd3a63066366e64d8da377f67c0ee7e42ca1d/dspace/config/spring/api/discovery.xml#L103

Related work
4f17b41

[floriangantner]

has been fixed by 4Science/dspace-angular@c2c5e1a on the newest release