Update cookbook plugin to latest version

This revision adds:
- Extend Gerrit's top menu with plugin-owned entry

Change-Id: Iab0da66e9ecee990cb163e35110e5405054c32c5
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
diff --git a/plugins/cookbook-plugin b/plugins/cookbook-plugin
index fa735ff..b31cee7 160000
--- a/plugins/cookbook-plugin
+++ b/plugins/cookbook-plugin
@@ -1 +1 @@
-Subproject commit fa735ff03feed221397188f3d6b761ebf6aaaec7
+Subproject commit b31cee76e19d30e8b6bda41af5a15ab5f7668b97