VOL-471: clean up VOLTHA author, email

and other data in setup.py
MAINTAINER in docker/Dockerfile.* change to info@opennetworking.org

Change-Id: I0d9557086b2938673fb398170566acc64f0e9e72
diff --git a/docker/Dockerfile.tester b/docker/Dockerfile.tester
index ba7deb9..6c22ad6 100644
--- a/docker/Dockerfile.tester
+++ b/docker/Dockerfile.tester
@@ -17,9 +17,7 @@
 
 FROM ${REGISTRY}${REPOSITORY}voltha-base:${TAG}
 
-MAINTAINER Zsolt Haraszti <zharaszt@ciena.com>
-MAINTAINER Ali Al-Shabibi <ali.al-shabibi@onlab.us>
-MAINTAINER Nathan Knuth   <nathan.knuth@tibitcom.com>
+MAINTAINER Voltha Community <info@opennetworking.org>
 
 RUN apt update && apt install -y iperf isc-dhcp-client tcpdump net-tools iproute2 iputils-ping wpasupplicant