Update jgit to 5bf7472

This update brings in two commits:
- ac127a7 - Don't handle internal git errors as an HTTP error
- 5bf7472 - Extract Exception -> HTTP status code mapping for reuse

Release-Notes: skip
Change-Id: I685f6ea26d87171c9e98b931a0318d77f9f4b33c
diff --git a/modules/jgit b/modules/jgit
index cb90ed0..5bf7472 160000
--- a/modules/jgit
+++ b/modules/jgit
@@ -1 +1 @@
-Subproject commit cb90ed08526bd51f04e5d72e3ba3cf5bd30c11e4
+Subproject commit 5bf7472e0ca967893f9fdb653c3f1b22fb6d56e5