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/.gitignore b/.gitignore
index 2843ab3..04760cb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -62,3 +62,6 @@
 # voltha cli history
 python/cli/.voltha_cli_history
 
+# Development versions of locally built libraries
+python/pyvoltha
+