VOL-1449 Update requirements to match pyvoltha

Also ignore and cleanup any local pyvoltha copies.
Also no longer need voltha-protos image

Change-Id: Id42676e38f38f3014bf547fd7820abf7eb2d5ea5
diff --git a/python/Makefile b/python/Makefile
index 803a132..7ea572e 100644
--- a/python/Makefile
+++ b/python/Makefile
@@ -172,7 +172,7 @@
 	make -C voltha/protos install-protoc
 
 clean:
-	rm -r pyvoltha
+	rm -rf pyvoltha
 	find . -name '*.pyc' | xargs rm -f
 
 distclean: clean