com.enonic.xp:lib-auth vulnerable to Session Fixation
### Impact
All id-providers using lib-auth `login` method.
### Patches
https://github.com/enonic/xp/commit/0189975691e9e6407a9fee87006f730e84f734ff
https://github.com/enonic/xp/commit/2abac31cec8679074debc4f1fb69c25930e40842
https://github.com/enonic/xp/commit/1f44674eb9ab3fbab7103e8d08067846e88bace4
### Workarounds
Don't use lib-auth for `login`.
Java API uses low-level structures and allows to invalidate previous session before auth-info is added.
### References
https://github.com/enonic/xp/issues/9253