fixes 1777 - adding proper product validation for reposet cli commands
CLI: add messages to filter rule creation and deletion, fixes #956151.
Merge pull request #25 from waldenraines/956151

CLI: add messages to filter rule creation and deletion, fixes #956151.
Merge pull request #16 from jlsherrill/repo-set-fix

fixes 1777 - adding proper product validation for reposet cli commands
headpin-lib-cli - remove env edit commands from headpin
core/ram subs - displaying subscriptions limits

``` bash
$ katello <auth> org subscriptions --name acme
```
pass in installed products on register
Merge pull request #28 from beav/add-installed-product

pass in installed products on register
Merge pull request #27 from komidore64/cores-yo

core/ram subs - displaying subscriptions limits
Merge pull request #26 from thomasmckay/headpin-lib-cli

headpin-lib-cli - remove env edit commands from headpin
remove domain tests (remnant of former Foreman integration)
fixing errata tests

after making specifiing a repository required