Merge branch 'stable-5.3'

Merge branch 'stable-5.3'

* stable-5.3:
  Prepare 5.3.2-SNAPSHOT builds
  JGit v5.3.1.201904271842-r
  Prepare 5.2.3-SNAPSHOT builds
  JGit v5.2.2.201904231744-r
  Revert 4678f4b and provide another solution for bug 467631
  Apache MINA sshd: make sendKexInit() work also for re-keying
  Prepare 5.1.8-SNAPSHOT builds
  JGit v5.1.7.201904200442-r
  ObjectUploadListener: Add callback interface
  Prepare 4.11.9-SNAPSHOT builds
  JGit v4.11.8.201904181247-r
  Prepare 4.9.11-SNAPSHOT builds
  JGit v4.9.10.201904181027-r
  Prepare 4.7.10-SNAPSHOT builds
  JGit v4.7.9.201904161809-r
  Prepare 4.5.8-SNAPSHOT builds
  JGit v4.5.7.201904151645-r
  Remember the cause for invalidating a packfile
  Fix API problem filters
  Fix pack files scan when filesnapshot isn't modified

Change-Id: I8a8671f7767444a77b809bd66a27d776c8332736
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>