Merge branch 'stable-4.2'

Merge branch 'stable-4.2'

* stable-4.2:
  NoteMapTest: Open TreeWalk instances in try-with-resource
  ObjectDirectoryTest: Fix warnings about variable hiding
  PackWriterTest: Open RevWalk in try-with-resource
  PatchIdDiffFormatterTest: Open Git and PatchIdDiffFormatter in try-with-resource
  PathSuffixFilterTest: Open TreeWalk in try-with-resource
  PostOrderTreeWalkTest: Open TreeWalk in try-with-resource
  PullCommandWithRebaseTest: Open RevWalk in try-with-resource
  PushCommandTest: Open Git instances in try-with-resource
  RacyGitTests: Open NameConflictTreeWalk in try-with-resource
  RecursiveMergerTest: Open TreeWalk and BufferedReader in try-with-resource
  ReflogConfigTest: refactor commit method to avoid variable hiding
  Update .mailmap
  RefDirectoryTest: Fix warning about member variable hiding
  ReflogResolveTest: Open Git instances in try-with-resource
  ReflogTest: Open Git instances in try-with-resource
  RepoCommandTest: Open Git instances in try-with-resource

Change-Id: I7964b699396629e31a9cc5600aedcf4be4e659a8
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>