Updated git submodules

Project: netconf master 4b8e561e5979fc3300c6fdaade0f55ec1fc6cfe3

BUG-9132: don't provide a value for restconf/streams/events

The yang type of events leaf is 'type empty', meaning there should be no value.
As of Carbon performing a GET on restconf/streams causes a cast
exception due to the empty string value here. See EmptyJSONCodec in
yangtools.

Change-Id: If0501b9c5459f4255096a4f070968c87a749407e
Signed-off-by: Evan Zeller <evanrzeller@gmail.com>

diff --git a/docs/submodules/netconf b/docs/submodules/netconf
index 5b0a7abfd0d879d30b58a25116842b853be9cad9..4b8e561e5979fc3300c6fdaade0f55ec1fc6cfe3 160000 (submodule)
--- a/docs/submodules/netconf
+++ b/docs/submodules/netconf
@@ -1 +1 @@
-Subproject commit 5b0a7abfd0d879d30b58a25116842b853be9cad9
+Subproject commit 4b8e561e5979fc3300c6fdaade0f55ec1fc6cfe3