Install bc in the kubekins-test image

It is needed by the shell2junit script.

hack/jenkins/dockerized-e2e-runner.sh

@@ -61,5 +61,5 @@ docker run --rm=true -i \
   -e "WORKSPACE=/workspace" \
   ${KUBEKINS_SERVICE_ACCOUNT_FILE:+-e "KUBEKINS_SERVICE_ACCOUNT_FILE=/service-account.json"} \
   "${docker_extra_args[@]:+${docker_extra_args[@]}}" \
-  gcr.io/google_containers/kubekins-test:go1.6.3-docker1.9.1-rev2 \
+  gcr.io/google_containers/kubekins-test:go1.6.3-docker1.9.1-rev3 \
   bash -c "bash <(curl -fsS --retry 3 --keepalive-time 2 'https://raw.githubusercontent.com/kubernetes/kubernetes/master/hack/jenkins/e2e-runner.sh')"

hack/jenkins/gotest-dockerized.sh

@@ -45,5 +45,5 @@ docker run --rm=true \
   -e "KUBE_VERIFY_GIT_BRANCH=${KUBE_VERIFY_GIT_BRANCH:-}" \
   -e "REPO_DIR=${REPO_DIR}" \
   -e "HOST_ARTIFACTS_DIR=${HOST_ARTIFACTS_DIR}" \
-  -i gcr.io/google_containers/kubekins-test:go1.6.3-docker1.9.1-rev2 \
+  -i gcr.io/google_containers/kubekins-test:go1.6.3-docker1.9.1-rev3 \
   bash -c "cd kubernetes && ${KUBE_TEST_SCRIPT:-./hack/jenkins/test-dockerized.sh}"

hack/jenkins/test-image/Dockerfile

@@ -26,12 +26,14 @@ ENV DOCKER_VERSION          1.9.1
 
 WORKDIR /workspace
 
+# bc is needed by shell2junit
 # dnsutils is needed by federation cluster scripts.
 # file is used when uploading test artifacts to GCS.
 # jq is used by hack/verify-godep-licenses.sh
 # python-pip is needed to install the AWS cli.
 # netcat is used by integration test scripts.
 RUN apt-get -o Acquire::Check-Valid-Until=false update && apt-get install -y \
+        bc \
 	dnsutils \
 	file \
 	jq \

hack/jenkins/test-image/Makefile

@@ -16,7 +16,7 @@ all: push
 
 # Tag format: $GO_VERSION-$EMBEDDED_DOCKER_VERSION-$REVISION
 # These versions are specified in the Dockerfile
-TAG = go1.6.3-docker1.9.1-rev2
+TAG = go1.6.3-docker1.9.1-rev3
 
 container:
 	docker build -t gcr.io/google_containers/kubekins-test .