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.