remove hacky department selection, reimplement with existing extensible list
model: institutional groups: always sort list by internal id
test: spec_helper_feature_shared: sign_in_as work if zhdk_integration is on
test: adjust instgroup test
test: add scenario to check if group are filtered if zhdk_integration is on
tmp: use forked zhdk-gem
(test if test fails #2)
fix: make it a closed list (only existing entries are allowed)
mark .to_s as to-be-overwritten
try to fix the tests
hack for config in cider