Add Quobyte volumes in docs

[johscheuer]

Now to the right branch #1061

Thanks @pwittrock :)

---

This change is

[johscheuer]

Ping @thockin

[johscheuer]

The failed check seems unrelated to the PR:

The command "git config --global user.email ${GIT_EMAIL}" exited with 1.
$ git config --global user.name "${GIT_NAME}"
...
$ git push
warning: push.default is unset; its implicit value is changing in
Git 2.0 from 'matching' to 'simple'. To squelch this message
and maintain the current behavior after the default changes, use:
  git config --global push.default matching
To squelch this message and adopt the new behavior now, use:
  git config --global push.default simple
See 'git help config' and search for 'push.default' for further information.
(the 'simple' mode was introduced in Git 1.7.11. Use the similar mode
'current' instead of 'simple' if you sometimes use older versions of Git)
remote: Anonymous access to kubernetes-v1-4/kubernetes-v1-4.github.io.git denied.
fatal: Authentication failed for 'https://:@github.com/kubernetes-v1-4/kubernetes-v1-4.github.io.git/'
The command "git push" exited with 128.

[devin-donnelly]

This looks fine; I'm not sure why that Travis check failed. @jeffmendoza , any insight?

Otherwise I can just merge this.

[jeffmendoza]

@jaredbhatti The release-1.4 branch needs it credentials updated as well.

[janetkuo]

I hit this also and filed issue #1124

[janetkuo]

The travis scripts is updated. The build should succeed after rebasing.

[janetkuo]

I merged #1159 so after another rebase the travis should pass

[janetkuo]

Oh wait, I re-run the build and it passed. No need to rebase.

[saad-ali]

LGTM @kubernetes/docs for final sign-off.

[thockin]

@devin-donnelly @jaredbhatti for 1.4

[devin-donnelly]

Docs LGTM. Merging to release-1.4. Thanks, everybody.