[backend] don't pass createrepo options to modifyrepo

Fixing travis
[api] modifyrepo does not add "updateinfo", but prefixes it with md5
[webui][api] Fix, refactor and test user sign up
Revert "[backend] don't pass createrepo options to modifyrepo"

now that the travis packages are uptodate
[backend] fix full tree rebuild handling of meta files
[api] raise rubygem versions to current state
[webui] Fix saving interconnects from /configuration