Add files for catalog zero testing

This commit does the following:

* Adds some certs (both pem format and corresponding .jks files) that can be
  used for testing a master with "real" certs.
* Adds a `gatling.conf` file that allows us to register the SSL certs
  for use by gatling, and tweaks a few other gatling settings
* Adds the catalog recording and associated config files for catalog zero
* Adds a few scenarios for catalog zero.
Merge pull request #79 from cprice404/catalog-zero

perfect timing
Merge branch 'master' of github.com:puppetlabs/gatling-puppet-load-test

Pulling changes from main repo