Updating requirements file so that images work without LOCAL_PROTOS build

Change-Id: If48a3c74704a27b73e45a4600dab42da7474466b
diff --git a/python/requirements.txt b/python/requirements.txt
index 6df1689..f2d84f1 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -64,5 +64,5 @@
 pexpect==4.6.0
 python-consul==0.6.2
 afkak==3.0.0.dev20181106
-pyvoltha==0.1.9
-voltha-protos==0.1.3
+pyvoltha==0.2.0
+voltha-protos==0.1.4