[BUGFIX] UnitTests create SQL error if openid is installed

AbstractUserAuthenticationTest is actually supposed to test
processLoginData from AuthenticationService from ext:sv.
However it fails to properly setup all auth parameters, therefore auth
services that depend on further settings fail.

This moves the test to the actually tested code (extension sv).
The test is adopted accordingly.

Additionally both tests are cleaned up from unneeded setUp/tearDown
functions.

Resolves: #56586
Releases: 6.2
Change-Id: I7406a56e5274ea54d400c1c116a8ea81c5cf4cea
Reviewed-on: https://review.typo3.org/28090
Reviewed-by: Markus Klein
Tested-by: Markus Klein
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters