Update openshift helpers - with this ghost can be deployed.

[absoludity]

With this change I can deploy kubeapps successfully and use kubeapps to deploy Ghost (which has non-root images).

I can't deploy wordpress due to https://github.com/bitnami/bitnami-docker-wordpress/issues/127 , and deploying ghost locally requires the following value overrides:

ghostHost: localhost
securityContext:
  - fsGroup: 1000050000
  - fsUser: 1000050000
mariadb:
  securityContext:
    - fsGroup: 1000050000
    - fsUser: 1000050000
  persistence:
    enabled: false
persistence:
  enabled: false

(though I see on #676 that I can use securityContext: false instead - I'll try that too)

So not ideal, but:

\o/

Still to come:

• Documentation
• Update to test deploying with non cluster-admin user
• Update tiller service account to not use cluster-admin

ref: #676

[andresmgot]

great! let me know if you find any blocker

[andresmgot]

you are missing the last line

[andresmgot]

not sure why you need this?

[absoludity]

Otherwise if someone pulls our Kubeapps repo and runs make openshift-kubeapps it fails because it's deploying the chart from the current branch, which won't include the chart deps initially.