Add a failsafe require and add first working version of 1.7 in automatic tests

[ga-devfront]

Questions	Answers
Description?	If you try upgrading from 1.7.1.0 to a version below 1.7.3.0, you get an error about AppKernel because this class is not present in the core autoload classmap. This PR adds: A safety net while loading AppKernel Expands the tested versions of PrestaShop in CI, Improved the readability of the base version running the shop in CI.
Type?	bug fix
BC breaks?	no
Deprecations?	no
Fixed ticket?	NA
Sponsor company	@PrestaShopCorp
How to test?	Check if CI is green. To check the fix, try upgrading a PrestaShop 1.7.1.0 to 1.7.2.0.

[AureRita]

Hi @ga-devfront

Thank you for your PR, Currently I tried to upgrade to 1.7.3.0, I don't have the App Kernel but when i'm on 1.7.3.0 I only have blanck page as you can see :

recording.193.webm

Did I miss something ?

Waiting for your correction

Thank you

[Quetzacoalt91]

@AureRita this is likely caused by the issue fixed in #690, let me rebase so you try again.

[AureRita]

Hi @ga-devfront

I have the same things that previously as you can see :

recording.196.webm

Waiting for your correction

Thank you

The merge-base changed after approval.

[AureRita]

Hi @ga-devfront

After other research, I know that this issue is not due to your PR.

Your PR correct the issue on the App Kernel.

I tested on :
1.7.1.0 to 1.7.8.11 from minor release
8.0.3 to 9.0.0 to check the non regression

Because the PR seems to work as expected, it's a QA ✔️

Thank you