Allow self joining GetFeature without aliases

Description

The CITE tests are issuing a self joining request without using aliases, as follows:

Discussion on whether this is valid or not has stalled, so I'm making GeoServer understand the above regardless...

Environment

None

Status

Assignee

Andrea Aime

Reporter

Andrea Aime

Triage

None

Fix versions

Affects versions

None

Components

Priority

Medium
Configure