Merge branch 'stable-5.4'

* stable-5.4:
  Prepare 5.4.3-SNAPSHOT builds
  JGit v5.4.2.201908231537-r
  Prepare 5.3.5-SNAPSHOT builds
  JGit v5.3.4.201908231101-r
  Prepare 5.1.11-SNAPSHOT builds
  JGit v5.1.10.201908230655-r
  Use AtomicReferences to cache user and system level configs
  Fix copy-paste typo in CloneCommand#cleanup
  SystemReader: Use correct constructor of FileBasedConfig

Change-Id: I241dd1314f5535147ad641576a25f49cae6fe62d
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

diff --cc org.eclipse.jgit.packaging/org.eclipse.jgit.target/META-INF/MANIFEST.MF
index 0000000000000000000000000000000000000000,2fe366c009d38ed53763780aa40673c3319292db..b17ee5e993b1694f9054a64201615fc2a4bf1a34
mode 000000,100644..100644
--- /dev/null
--- 2/org.eclipse.jgit.packaging/org.eclipse.jgit.target/META-INF/MANIFEST.MF
+++ b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/META-INF/MANIFEST.MF
@@@ -1,0 -1,5 +1,5 @@@
 -Bundle-Version: 5.4.3.qualifier
+ Manifest-Version: 1.0
+ Bundle-ManifestVersion: 2
+ Bundle-Name: JGit Target Platform Bundle
+ Bundle-SymbolicName: org.eclipse.jgit.target
++Bundle-Version: 5.5.0.qualifier