SEBA-676 Install mcjoin tool in RG container

Change-Id: I7bbed43d9596f9fe62b83f509f565675f0a960a3
(cherry picked from commit c1890e2fb06dc862ce9005c01756ee0b620a2b28)
diff --git a/docker/Dockerfile.tester b/docker/Dockerfile.tester
index 6c22ad6..fcb464a 100644
--- a/docker/Dockerfile.tester
+++ b/docker/Dockerfile.tester
@@ -19,7 +19,9 @@
 
 MAINTAINER Voltha Community <info@opennetworking.org>
 
-RUN apt update && apt install -y iperf isc-dhcp-client tcpdump net-tools iproute2 iputils-ping wpasupplicant
+RUN apt update && apt install -y iperf isc-dhcp-client tcpdump net-tools iproute2 iputils-ping wpasupplicant wget
+RUN wget https://github.com/troglobit/mcjoin/releases/download/v2.4/mcjoin_2.4_amd64.deb
+RUN dpkg -i mcjoin_2.4_amd64.deb
 
 COPY config/igmp.py /usr/local/bin
 COPY config/igmpv3.py /usr/local/bin