DMTF Usecase checker tool requirement package

Refer https://github.com/DMTF/Redfish-Usecase-Checkers#prerequisites

Change-Id: I9851e918a0ac35dc3a1ae4dd44c021cc84a4fedf
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/scripts/build-qemu-robot-docker.sh b/scripts/build-qemu-robot-docker.sh
index 527831c..72e40a8 100755
--- a/scripts/build-qemu-robot-docker.sh
+++ b/scripts/build-qemu-robot-docker.sh
@@ -83,7 +83,8 @@
 RUN pip3 install \
     beautifulsoup4 --upgrade \
     lxml \
-    jsonschema
+    jsonschema \
+    redfishtool
 
 RUN wget https://sourceforge.net/projects/ipmitool/files/ipmitool/1.8.18/ipmitool-1.8.18.tar.bz2
 RUN tar xvfj ipmitool-*.tar.bz2