Merge branch 'master' into stable-4.4

* master:
  Fix javadoc errors and unused imports introduced by ddd0fe25
  RepoCommand: record manifest shallow recommendation in .gitmodules
  RepoCommand: record manifest groups as submodule labels
  Remove the deprecated TestRepository.getClock() method
  Replace use of deprecated method Repository.getRef()
  [findBugs] Prevent potential NPE in
    FileLfsRepository.getOutputStream()
  Better report on client side if push failed due to too large object
  [findBugs] Prevent potential NPE in CloneCommand.init()
  RepoCommand: remove --record-remote-branches
  RepoCommandTest: Improve assertion message for remote branch recording

Change-Id: I4fbce4f84925a933fcc9a48058ed6793f5821b97
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>