Update nginx ingress controller version to 0.9-beta.11

[aledbf]

Fixes NGINX CVE-2017-7529

[minikube-bot]

Can one of the admins verify this patch?

[dlorenc]

@minikube-bot ok to test

[codecov-io]

Codecov Report

Merging #1703 into master will decrease coverage by 2.53%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1703      +/-   ##
==========================================
- Coverage   38.49%   35.95%   -2.54%     
==========================================
  Files          51       51              
  Lines        2681     3332     +651     
==========================================
+ Hits         1032     1198     +166     
- Misses       1469     1954     +485     
  Partials      180      180

Impacted Files	Coverage Δ
pkg/minikube/cluster/credentials.go	40% <0%> (-10%)	⬇️
pkg/util/kubeconfig/config.go	45.45% <0%> (-5.95%)	⬇️
pkg/minikube/cluster/localkube_caching.go	54.9% <0%> (-5.57%)	⬇️
pkg/localkube/ready.go	44.44% <0%> (-5.56%)	⬇️
pkg/util/config.go	61.76% <0%> (-5.51%)	⬇️
cmd/minikube/cmd/version.go	20% <0%> (-5%)	⬇️
pkg/minikube/sshutil/sshutil.go	45.36% <0%> (-4.64%)	⬇️
pkg/util/crypto.go	59.81% <0%> (-4.05%)	⬇️
cmd/minikube/cmd/env.go	60.37% <0%> (-4.02%)	⬇️
pkg/minikube/service/service.go	30.62% <0%> (-3.91%)	⬇️
... and 36 more

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