[BUGFIX] Missing configuration in scheduler task

Basically the scheduler task does two things:
1. It fetches all users matching the configured filters
2. Gets detailed informations of the users and does the sync
   with local ones

The first step worked, but the second one not. Just because the
configuration (filter, attributes) gets not loaded in class
tx_igldapssoauth_auth.

This patch fixes this circumstance.

Resolves: #60007
Change-Id: Ifaf4b35da20f9e6712e4af71f69fce853e9ba8f9
Reviewed-on: https://review.typo3.org/31259
Reviewed-by: Armin Ruediger Vieweg
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers