Update Helm to 2.11.0

This will likely fail on first PR, as we will need
to update the Helm install on the e2e cluster.

A good opportunity to delete and restart the e2e cluster
anyway -- but will need to manage this around other PRs.

Should enable googleforgames#375 to pass tests as well.

build/build-image/Dockerfile

@@ -49,7 +49,7 @@ RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/v${KUBECT
 RUN echo "source <(kubectl completion bash)" >> /root/.bashrc
 
 # install Helm package manager
-ENV HELM_VER 2.9.1
+ENV HELM_VER 2.11.0
 ENV HELM_URL https://storage.googleapis.com/kubernetes-helm/helm-v${HELM_VER}-linux-amd64.tar.gz
 RUN curl -L  ${HELM_URL} > /tmp/helm.tar.gz \
     && tar -zxvf /tmp/helm.tar.gz -C /tmp \
@@ -69,8 +69,7 @@ RUN go get -u github.com/golang/dep/cmd/dep && \
     go get -u golang.org/x/tools/cmd/goimports
 
 # install golang-ci linter
-RUN curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | \
-    bash -s -- -b $GOPATH/bin v1.10.2
+RUN curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $GOPATH/bin v1.10.2
 
 # install the release branch of the code generator tools
 RUN mkdir -p /go/src && cd /go/src && mkdir -p k8s.io && cd k8s.io && \

build/e2e-image/Dockerfile

@@ -6,7 +6,7 @@ RUN apt-get update && \
 
 # install go
 WORKDIR /usr/local
-ENV GO_VERSION=1.10.3
+ENV GO_VERSION=1.11.1
 ENV GOPATH /go
 RUN wget -q https://redirector.gvt1.com/edgedl/go/go${GO_VERSION}.linux-amd64.tar.gz && \
     tar -xzf go${GO_VERSION}.linux-amd64.tar.gz && rm go${GO_VERSION}.linux-amd64.tar.gz && mkdir ${GOPATH}
@@ -20,7 +20,7 @@ RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/v${KUBECT
     mv ./kubectl /usr/local/bin/kubectl
 
 # install Helm package manager
-ENV HELM_VER 2.9.1
+ENV HELM_VER 2.11.0
 ENV HELM_URL https://storage.googleapis.com/kubernetes-helm/helm-v${HELM_VER}-linux-amd64.tar.gz
 RUN curl -L  ${HELM_URL} > /tmp/helm.tar.gz \
     && tar -zxvf /tmp/helm.tar.gz -C /tmp \