gosa-quickstart: some refactoring and cleanup in LDAP data
class_workstationStartup.inc: remove BAD_CLASSES filtering
if necessary implement this by extending go-susi's reply to gosa_query_fai_...,
not with direct LDAP queries.
packaging: don't add generate_package_list.go to .deb package
distinguish between repository releases (trusty-backports) and FAI releases (trusty)
Only FAI releases can be selected for installation.
Repository releases create pseudo-FAI classes for the corresponding FAI release