Migration to new event defination for OpenONU adapter

     This change is for the migration of alarms and KPIs for earlier
     separate defination of AlarmEvent and KPIEvent to a generic format
     called Event where it could be an alarm or a KPI event

     An event manager adapter_events handles the event submission.

Change-Id: If088a1876fbbae2975ef77c4364dd96bbe361c8d
(cherry picked from commit ffc89df486ba6e8664975ebef8e3899d9c227f78)
diff --git a/python/requirements.txt b/python/requirements.txt
index d672023..e2ef02f 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==2.1.1
+pyvoltha==2.1.2