VOL-2311: Better logging and remove old code

- tasks have better detail
- 1.x functions removed
- extraineous logging removed
- build info injected into environment, viewable
  in log and voltctl similar to openolt

Change-Id: I9b22334c3049efa857b485cca28a343b36514ab6
diff --git a/python/requirements.txt b/python/requirements.txt
index e67e469..a7a5fce 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -1,2 +1,2 @@
 voltha-protos==2.1.2
-pyvoltha==2.3.6
+pyvoltha==2.3.7