Merge branch 'stable-5.0' into stable-5.1

* stable-5.0:
  Prepare 5.0.4-SNAPSHOT builds
  JGit v5.0.3.201809091024-r
  Prepare 4.9.5-SNAPSHOT builds
  JGit v4.9.4.201809090327-r
  Fix @since tag for LOCK_SUFFIX
  Prepare 4.7.4-SNAPSHOT builds
  JGit v4.7.3.201809090215-r

Change-Id: I9117b961035ee527cb8e1dd5df59976fff83829d
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

diff --cc org.eclipse.jgit/src/org/eclipse/jgit/lib/Constants.java
Simple merge