Merge branch 'stable-6.3' into stable-6.4

* stable-6.3:
  Add missing since tag for SshBasicTestBase
  Add missing since tag for SshTestHarness#publicKey2
  Silence API errors
  Prevent infinite loop rescanning the pack list on PackMismatchException
  Remove blank in maven.config

Change-Id: I18b46be0f09535c61efabe24ab1579faa3d06ba8

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