bs-upload-kernel: Use one package list (JSC-SLE#5501, boo#1211226, bsc#1218184)
    
    There were ultiple package lists passed to upload_package supporting the
    distinction between package names starting with kernel- which can be
    individually selected for build, and other packages. Pass only one
    package list to simplify the logic and make it possible to know the full
    package list before doing the upload.