Merge changes from topic "jgit-5.1.1"

* changes:
  ProjectResetter: Replace trivial usage of deprecated Repository.getAllRefs
  PatchListEntry: Don't use deprecated Constants.CHARSET from JGit
  Upgrade JGit to 5.1.1.201809181055-r


* submodules:
* Update plugins/reviewnotes from branch 'master'
  to 54525ffaed5e8925d97657a622532a00a0006347
  - CreateReviewNotes: Don't use deprecated Repository.getAllRefs
    
    Change-Id: I867c5003185c9b41c5182b8d05e9db2d9dae2cfa
    
diff --git a/plugins/reviewnotes b/plugins/reviewnotes
index 920f28b..54525ff 160000
--- a/plugins/reviewnotes
+++ b/plugins/reviewnotes
@@ -1 +1 @@
-Subproject commit 920f28b46021d9c49fac09d869aa4040d13796e7
+Subproject commit 54525ffaed5e8925d97657a622532a00a0006347