Default persistence storage class needs to be created during kubernetes cluster install

[shrajfr12]

In addons for canonical-kubernetes, spell we install via helm. If a "default" persistent storage class is created during cluster creation before addons are executed, pv claims can be accomodated and aws ebs volumes can get created.

How would this help? - The addon script will be much simpler and fewer kubectl statements. The idea is to create resources only via helm and only use kubectl for exceptions. With a standard default storageclass, all helm installs can refer to this storageclass,

[adam-stokes]

@shrajfr12 Thanks! We would love for any additional help you could provide us to make the spells better!