Upgrade JGit to 4.3.0.201604071810-r

this version brings the following fixes

- Fix jgit gc which retained garbage packs for 2 weeks which resulted
in repo size explosion [1] by introducing a new option for pack expiration
which by default expires packs after 1 hour

- Fix refcounting and reclaiming memory in RepositoryCache. Hugo
validated that this reduces memory consumption in Gerrit considerably

- Make the FileLfsRepository thread safe. This fixes a severe threading
issue for the lfs-storage-fs plugin [2]

[1] https://groups.google.com/forum/#!searchin/repo-discuss/gc/repo-discuss/JW06GsH0vLo/9GV4TL0VDgAJ
[2] https://git.eclipse.org/r/#/c/52177/16/org.eclipse.jgit.lfs.server/src/org/eclipse/jgit/lfs/server/fs/FileLfsServlet.java

Change-Id: If6ba90c5e79747d20338ad32f03624a6bd75ee43
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

lib/jgit/org.eclipse.jgit.junit/BUCK

@@ -4,7 +4,7 @@ include_defs('//lib/JGIT_VERSION')
 maven_jar(
   name = 'junit',
   id = 'org.eclipse.jgit:org.eclipse.jgit.junit:' + VERS,
-  sha1 = 'c68ddb3e2aaca05b1d2f8250dd107b5f484ed603',
+  sha1 = '060a98c260b23f64c47e3fb4d77b684ccb64c114',
   license = 'DO_NOT_DISTRIBUTE',
   repository = REPO,
   unsign = True,