bump ci go version to 1.5.2

hack/jenkins/gotest-dockerized.sh

@@ -42,5 +42,5 @@ docker run --rm=true \
   -v "${REPO_DIR}":/go/src/k8s.io/kubernetes \
   -v "${KUBE_JUNIT_REPORT_DIR}":/workspace/artifacts \
   --env REPO_DIR="${REPO_DIR}" \
-  -i gcr.io/google_containers/kubekins-test:0.3 \
+  -i gcr.io/google_containers/kubekins-test:0.5 \
   bash -c "cd kubernetes && ./hack/jenkins/test-dockerized.sh"

hack/jenkins/test-image/Dockerfile

@@ -15,7 +15,7 @@
 # This file creates a build environment for building and running kubernetes
 # unit and integration tests
 
-FROM golang:1.4
+FROM golang:1.5.2
 MAINTAINER  Jeff Lowdermilk <jeffml@google.com>
 
 ENV WORKSPACE               /workspace

hack/jenkins/test-image/Makefile

@@ -1,6 +1,6 @@
 all: push
 
-TAG = 0.3
+TAG = 0.5
 
 container:
 	docker build -t gcr.io/google_containers/kubekins-test .