A bigger step 

- handle repositories in the new data structure
  + remove legacy methods for repository handling
    ~ getHttpsRepositoryCredentials_legacy
    ~ getRepositories_legacy
    ~ ignoreRepositories_legacy
    ~ setRepository_legacy
    ~ addRepositories_legacy
  + modify CommandLine object to handle KIWIXMLRepositoryData objects
    instead of handle arrays of disconnected repository data
  + modify the command line processor (kiwi.pl) to create
    KIWIXMLRepositoryData objects
  + eliminate the repository processing from the changeset that is
    used to modify the boot description. The information is still in the
    changeset but is no longer considered