VOL-2103 - Device reason update modifications

get_device + device_updates are changed by new api device_reason_update.

****Change 15759 and Change 15760  need to be merged before this.

Change-Id: I7e361a11f35f81c42c65433ccac32e4b3e5790a2
diff --git a/python/requirements.txt b/python/requirements.txt
index 333f904..547f1a4 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==2.2.3
+pyvoltha==2.2.4