VOL-1330 Update pyvoltha/openomci

Includes omci resync/reconcile fixes.

Change-Id: I2fc0fe009be9f195c140de3ba900e5331180e105
diff --git a/python/requirements.txt b/python/requirements.txt
index 3417b63..ce0cffd 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -60,4 +60,4 @@
 python-consul==0.6.2
 afkak==3.0.0.dev20181106
 voltha-protos==1.0.0
-pyvoltha==2.1.3
+pyvoltha==2.1.4