VOL-2861 Update pyvoltha and protos to latest for timestamp change

Change-Id: I81058be901b9970e1538ae5797b30c52b8e32128
diff --git a/python/requirements.txt b/python/requirements.txt
index a7f2337..f03f4a0 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -1,2 +1,2 @@
-voltha-protos==3.3.0
-pyvoltha==2.4.1
+voltha-protos==3.3.2
+pyvoltha==2.4.2