Upgrade JGit to 4.6.1.201703071140-r.169-g61e336475

This is a snapshot of the latest head of JGit's master branch.

Jetty was changed to version 9.3.17.v20170317.  This version change
will be done for Gerrit in a follow-up commit.

Change-Id: I19ca866f90b16260f72fdd9cdc97683031b48488

lib/jgit/jgit.bzl

@@ -1,6 +1,6 @@
 load("//tools/bzl:maven_jar.bzl", "GERRIT", "MAVEN_LOCAL", "MAVEN_CENTRAL", "maven_jar")
 
-_JGIT_VERS = "4.6.1.201703071140-r.149-g61f830d3a"
+_JGIT_VERS = "4.6.1.201703071140-r.169-g61e336475"
 
 _DOC_VERS = "4.6.0.201612231935-r" # Set to _JGIT_VERS unless using a snapshot
 
@@ -26,28 +26,28 @@ def jgit_maven_repos():
         name = "jgit_lib",
         artifact = "org.eclipse.jgit:org.eclipse.jgit:" + _JGIT_VERS,
         repository = _JGIT_REPO,
-        sha1 = "dbb390b827b968558342e882e0c9b90e1ed037a2",
-        src_sha1 = "05d8939d08fe75a080fbf84f3163df5127950985",
+        sha1 = "ae2d80dfa58eff4228425eb49cd22fc3190637b9",
+        src_sha1 = "693c525ef00a5e1ab918d90aff9893a19ebf43dd",
         unsign = True,
     )
     maven_jar(
         name = "jgit_servlet",
         artifact = "org.eclipse.jgit:org.eclipse.jgit.http.server:" + _JGIT_VERS,
         repository = _JGIT_REPO,
-        sha1 = "136026aa28b065d04194cadcb3371b5a3f6c7235",
+        sha1 = "7610fde96610fbc17782ed383a721c4168bfd760",
         unsign = True,
     )
     maven_jar(
         name = "jgit_archive",
         artifact = "org.eclipse.jgit:org.eclipse.jgit.archive:" + _JGIT_VERS,
         repository = _JGIT_REPO,
-        sha1 = "8be5fa1000cf66ff3deae257bb29870c93f83363",
+        sha1 = "c5c6ecac620a62a1f4115dcff63d7baa257582f1",
     )
     maven_jar(
         name = "jgit_junit",
         artifact = "org.eclipse.jgit:org.eclipse.jgit.junit:" + _JGIT_VERS,
         repository = _JGIT_REPO,
-        sha1 = "d6a6c49b137a7f1a30ec55a228826d9146c0eba4",
+        sha1 = "5ed3263792c677e3e5a594d235f8360c38433324",
         unsign = True,
     )