Remove outdated examples

Examples in tests/ are outdated and referring to deleted classes.

Delete the examples in favor of the ones in README.md

Closed-Bug: #1262302
Change-Id: Id04f87ec82ed607210e1b7c22ba2c1091125eaf1
Merge "Remove outdated examples"
Merge git://github.com/puppetlabs/puppetlabs-nova