Update yaml used for tests and alm-examples

[thomasmckay]

#204 (comment)

1. A sane default config that is used for testing and for the CR documentation in alm-examples and we can use this file name for it.
2. Then we may want to have an empty config that allows the operator to set the defaults Gatekeeper ships with as you're providing in this PR.
3. Then optionally another one that allows us to test all options if not all of the options were added to default config from 1. above.