The `products` key in `rule_dirs.json` contains all products

#### Description of problem:
The products key is no longer useful to figure out what product a rule is applicable to.

#### SCAP Security Guide Version:
b895bce65b0d16d14bab9dadbd2f8e145d77e298

#### Operating System Version:
N/A

#### Steps to Reproduce:

1. `./utils/rule_dir_json.py`
2. `cat build/rule_dirs.json | jq '.["apt_conf_disallow_unauthenticated"]'.products`

#### Actual Results:
A list of all products

#### Expected Results:
Applicable products only listed.

#### Additional Information/Debugging Steps:
Related to prodtype removal.