Configured Workbench authenticator. Useful for development where BreedingManager may be launched outside workbench via straight URL. Currently inbuilt spring security login page will be presented for such case. In standard case, the pre authentication filter should always let the user in if user is authenticated in Workbench already.

Issue: BMS-69
Reviewer: RebeccaB
Authorisation rule for restricting Germplasm import screen - when accessed via Workbench sidebar url - to ADMIN and BREEDER users only.

Issue: BMS-64
Reviewer: RebeccaB