implementing #4082 (implement default permission groups)
add deletegroup
cdmlib fix for deleting groups in bulkeditor #4054
moving all beaninitializer classes to new package 'eu.etaxonomy.cdm.persistence.dao.initializer'
fixing MediaAutoInitializer & fixing bug in AbstractBeanInitializer
implement list find method for user and group services (#2283 and #2284). Tests are still missing.
Created a new service to handle group related stuff. The old implementation in UserService is still available but deprecated.