add upgrade of suseregister config on package upgrade
Merge branch 'master' of github.com:SUSE/connect
remove suffix from reg server url, allow more whitespeces in config
remove unrelated comment
Merge pull request #134 from SUSE/review_140709_add_migration_of_suseregister_config_in_package_post

[Review] Request from 'digitaltom' @ 'SUSE/connect/review_140709_add_migration_of_suseregister_config_in_package_post'