UniqueId bugs:
  - resolution of already created ids fails with NoSuchElementException
  - resolution of new ids fails silently
  Future.onSuccess calls was substituted by Future.map
UniqueId.resolveByName refactoring
Merge remote-tracking branch 'upstream/master' into UniqueId_fix2
Merge pull request #38 from VasilyKolpakov/UniqueId_fix2

Unique id fix2