Add rubocop_base.yml for common rubocop rules

[lindgrenj6]

https://issues.redhat.com/browse/RHCLOUD-10237

Rather than making a new repo lets use api-common as the main repo. We will need to update ALL THE THINGS after this is merged though!

[eclarizio]

@lindgrenj6 I'm fine with this if we want to keep it in here instead of the new "manageiq-style" repo, but I think with this change we have to update rubocop on dippy-bot to a later version. I made a similar PR for Catalog: https://github.com/RedHatInsights/catalog-api/pull/844 but dippy-bot is also complaining about missing linter config files.

[lindgrenj6]

@eclarizio yeah I think that is one thing we are going to try to do now/in the future. It would be really nice to upgrade to rubocop 1.0 since that was just released recently.

[dippy-bot]

Some comments on commit https://github.com/lindgrenj6/insights-api-common-rails/commit/fb07de3316973db064ecfb1eeea6c555f7bea9bb

.rubocop_base.yml

• [ ] :warning: - 132 - Detected pp. Remove all debugging statements.
• [ ] :warning: - 138 - Detected puts. Remove all debugging statements.

[dippy-bot]

Checked commit https://github.com/lindgrenj6/insights-api-common-rails/commit/fb07de3316973db064ecfb1eeea6c555f7bea9bb with ruby 2.5.7, rubocop 0.69.0, haml-lint 0.35.0, and yamllint 2 files checked, 1 offense detected

**

• [ ] :bomb: :boom: :fire: :fire_engine: - Linter/Yaml - missing config files

[syncrou]

@eclarizio @lindgrenj6 with the questions about Dippy Bot, that doesn't hold this PR up does it?

[eclarizio]

@syncrou I fixed dippy-bot this morning, so that should be good now, though it is currently pointing at the manageiq-style rules, not these (which makes sense since these haven't been merged yet anyway).