Merge branch 'stable-5.0'

* stable-5.0:
  Update to latest Photon Orbit R20180606145124
  Ensure index change event is fired when index snapshot changed

Change-Id: I8724fc92999d2bc0f8bde5e401156738dd9f1ee6
Signed-off-by: Jonathan Nieder <jrn@google.com>

diff --cc org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileRepository.java
Simple merge