Add overlay_ppa to tests_options

[coreycb]

This is a WIP, just looking to get some input before writing tests.

[freyes]

I didn't think there would be a use case to use more than one PPA but it might not hurt to code it that way from the start. yeah, I'm thinking on the edge cases where you want to stack a ppa from your personal namespace with the security proposed ppa, because you are testing a bug or something.

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.05 :tada:

Comparison is base (b2f2b46) 89.17% compared to head (986474b) 89.22%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #602 +/- ## ========================================== + Coverage 89.17% 89.22% +0.05% ========================================== Files 44 44 Lines 4655 4677 +22 ========================================== + Hits 4151 4173 +22 Misses 504 504 ``` | [Impacted Files](https://app.codecov.io/gh/openstack-charmers/zaza/pull/602?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openstack-charmers) | Coverage Δ | | |---|---|---| | [zaza/utilities/deployment\_env.py](https://app.codecov.io/gh/openstack-charmers/zaza/pull/602?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openstack-charmers#diff-emF6YS91dGlsaXRpZXMvZGVwbG95bWVudF9lbnYucHk=) | `99.10% <100.00%> (+0.21%)` | :arrow_up: |

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[coreycb]

The current py36 failures are unrelated to this change. I ran against the current HEAD of master and it also hit 93 failures.

[freyes]

The current py36 failures are unrelated to this change. I ran against the current HEAD of master and it also hit 93 failures.

yeah, I wonder if we should drop py36 at this point, zaza is running on focal (py38) when consumed by zosci, and I don't expect developers to be running on bionic (py36) since it went EOL already. //cc @ajkavanagh

[coreycb]

These should be exercising this code: https://review.opendev.org/q/topic:dnm-2023-2088

[coreycb]

I've put this review up to drop py36, py37 and py39: https://github.com/openstack-charmers/zaza/pull/603

[coreycb]

The most recent update should have full unit test coverage.

[coreycb]

Good catch, looking. I hadn't scrolled down to those failures.