[VOL-2781]

Rename docker image created by ofagent-py repo from `voltha-ofagent` to
`voltha-ofagent-py`

Change-Id: Iefc81e946e2424586c2ce42f6d899b4050acc19b
diff --git a/Makefile b/Makefile
index 0055e40..709da9e 100644
--- a/Makefile
+++ b/Makefile
@@ -28,7 +28,7 @@
 DOCKER_REGISTRY            ?=
 DOCKER_REPOSITORY          ?=
 DOCKER_TAG                 ?= $(VERSION)$(shell [[ $(DOCKER_LABEL_VCS_DIRTY) == "true" ]] && echo "-dirty" || true)
-IMAGENAME                  := $(DOCKER_REGISTRY)$(DOCKER_REPOSITORY)voltha-ofagent:$(DOCKER_TAG)
+IMAGENAME                  := $(DOCKER_REGISTRY)$(DOCKER_REPOSITORY)voltha-ofagent-py:$(DOCKER_TAG)
 
 ## Docker labels. Only set ref and commit date if committed
 DOCKER_LABEL_VCS_URL       ?= $(shell git remote get-url $(shell git remote))