Merge branch stable-2.9

* stable-2.9:
  Adapt to the JGit v4.5.x

Change-Id: I05ef83fe0facd8a00d4b124c13947137c0afdae4
tree: 7a1aa0b9ca731eb198e50c13b5edf634f14b7888
  1. .gitignore
  2. .settings/
  3. BUCK
  4. LICENSE
  5. src/