Updating python requirements file

Change-Id: I316c75b1f75ef3a3eade355dc6b0243fe4c3341a
diff --git a/python/requirements.txt b/python/requirements.txt
index b77bda8..7f94678 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -60,8 +60,8 @@
 etcd3==0.7.0
 pyparsing==2.2.0
 packaging==17.1
-pyvoltha==0.1.9
-voltha-protos==0.1.3
+pyvoltha==0.2.0
+voltha-protos==0.1.4
 
 # python-consul>=0.6.1  we need the pre-released version for now, because 0.6.1 does not
 # yet support Twisted. Once this is released, it will be the 0.6.2 version