Upgrade JGit to v4.5.4.201711221230-r

There are several fixes for git repos on NFS file systems and races with
git gc operations. The initial approach was to backport those fixes to
JGit's 4.1 branch and you can find those changes at [1]. Using the 4.5
branch became the preferred approach when other Gerrit community members
noted that they use Gerrit 2.12 in production with JGit 4.5.

[1] https://git.eclipse.org/r/#/q/status:abandoned+project:jgit/jgit+branch:stable-4.1+topic:downport

Change-Id: I4e9a25a3dd52a84810f67cc7c639beffb4219e9d
diff --git a/lib/jgit/BUCK b/lib/jgit/BUCK
index 3bf8f34..a7c19de 100644
--- a/lib/jgit/BUCK
+++ b/lib/jgit/BUCK
@@ -1,13 +1,13 @@
 include_defs('//lib/maven.defs')
 
 REPO = MAVEN_CENTRAL # Leave here even if set to MAVEN_CENTRAL.
-VERS = '4.3.0.201604071810-r'
+VERS = '4.5.4.201711221230-r'
 
 maven_jar(
   name = 'jgit',
   id = 'org.eclipse.jgit:org.eclipse.jgit:' + VERS,
-  bin_sha1 = 'e3c57967fb8df5172d62bb4bbbd355554db4c65d',
-  src_sha1 = '4d64b05a50d581a2884a5b7dc66163be18bac755',
+  bin_sha1 = 'b30f322c7d441260f4fa454ce5de65cf7e961274',
+  src_sha1 = '459f648f8bbf10e1aa0b122d4f9919e1779922e9',
   license = 'jgit',
   repository = REPO,
   unsign = True,
@@ -22,7 +22,7 @@
 maven_jar(
   name = 'jgit-servlet',
   id = 'org.eclipse.jgit:org.eclipse.jgit.http.server:' + VERS,
-  sha1 = '516925ff0df67705e368c905a910ed982655cc32',
+  sha1 = '264fac29b6007146127156113ed3d4e0aa922b39',
   license = 'jgit',
   repository = REPO,
   deps = [':jgit'],
@@ -36,7 +36,7 @@
 maven_jar(
   name = 'jgit-archive',
   id = 'org.eclipse.jgit:org.eclipse.jgit.archive:' + VERS,
-  sha1 = 'c065b765aac56cdbe531634fdfd829a6ce8bbd0c',
+  sha1 = '6b0b919ee42bf8276193c3c03581634bc3aa7e18',
   license = 'jgit',
   repository = REPO,
   deps = [':jgit',
@@ -53,7 +53,7 @@
 maven_jar(
   name = 'junit',
   id = 'org.eclipse.jgit:org.eclipse.jgit.junit:' + VERS,
-  sha1 = '060a98c260b23f64c47e3fb4d77b684ccb64c114',
+  sha1 = '58ca0a0fba72f2db6e6b27bd464dc44a946a617c',
   license = 'DO_NOT_DISTRIBUTE',
   repository = REPO,
   unsign = True,