images/tests/Dockerfile.rhel: Install jq

jq will allow us to simplify the templating which landed in
openshift/release@7e56379d0b (templates/openshift: grab bootstrap log
on failure, 2019-01-14, openshift/release#2633).

Author: wking

images/tests/Dockerfile.rhel

@@ -5,7 +5,7 @@ RUN make build WHAT=cmd/openshift-tests
 
 FROM registry.svc.ci.openshift.org/ocp/4.0:cli
 COPY --from=builder /go/src/github.com/openshift/origin/_output/local/bin/linux/amd64/openshift-tests /usr/bin/
-RUN yum install --setopt=tsflags=nodocs -y git gzip util-linux && yum clean all && rm -rf /var/cache/yum/* && \
+RUN yum install --setopt=tsflags=nodocs -y git gzip jq util-linux && yum clean all && rm -rf /var/cache/yum/* && \
     git config --system user.name test && \
     git config --system user.email [email protected]
 LABEL io.k8s.display-name="OpenShift End-to-End Tests" \