Add NETCONF notification for ONU activation and Kafka client to receive events, update dependencies

Change-Id: I5f768fa8077ef7c64e00a534744ca47492344935
diff --git a/Makefile b/Makefile
index 51f78d9..4dc3e14 100644
--- a/Makefile
+++ b/Makefile
@@ -50,10 +50,10 @@
 VOLTHA_TOOLS_VERSION ?= 2.5.3
 
 # Dependencies versions
-LIBYANG_VERSION		?= f9bbd46fa3a6b09291ec0c1e93ebf569f3e30bd1
-SYSREPO_VERSION		?= 64e3c66442d682c31e979db289c4c64a3ec1f6c1
-LIBNETCONF2_VERSION	?= ef7d3e3ca1504e8ca9c4f4b5dd3847ba17bb809d
-NETOPEER2_VERSION	?= 39800066f9fbbde9b55e6cfde77927eeb5627c83
+LIBYANG_VERSION		?= 9ad76850c140466488422c99f4ca01bf635b828a
+SYSREPO_VERSION		?= 9ef472743e57e346a820cede2e5d747713eb4197
+LIBNETCONF2_VERSION	?= 4d9d7993d710f1a9d17657e19a2d1eec803f3d6b
+NETOPEER2_VERSION	?= ebb5b0bfd89a77311724f35339d466abab96b743
 
 # Default user and password for the netconf user in docker-build
 NETCONF_USER ?= voltha