[15.0][l10n_br_base] unf*uck the 15.0 branch

[rvalyi]

TLDR : YES, YOU NEED TO CLONE THE OCA/l10n-brazil 15.0 BRANCH AGAIN!

Same problema and same process as for the 16.0 branch here

This is time the list of commits that were exclusively present in the 15.0 branch is shorter:

git cherry-pick a90c39dd3d74c6b3aa797186f8444ca0085b0c84  # [ADD] setup.py
git cherry-pick 8a96f209c0a1f992f0a971a069ee28b8364ce0c9  # [MIG][l10n_br_base] bump module version 15.0.1.0.0
git cherry-pick d1c67648a8cbfef4908975336225b13b6f9e859e  # [MIG] To new assets format
git cherry-pick b40fb382cea23a00228ed470d55a90687d2c60cc  # [REF] l10n_br_base res.config view
git cherry-pick f61a149c4bfbf443495bf1360d12e28049133598  # remove warnings: db odoo.tools.convert: HTML field 'signature' is declared as type=xml
git cherry-pick 9f39270ad7de3c65532f419a37344671edac719a  # remove warning: The model odoo.addons.l10n_br_base.models.res_partner_pix is not overriding the create method in batch
git cherry-pick c833ab3158195ec8da761cb5d6ee4212fd175f1d  # l10n_br_base: removed warning: Deprecated class SavepointCase has been merged into TransactionCase
git cherry-pick e8cac2e567561c15a8dfe36f6d988191578d481a  # l10n_br_base 15.0.1.0.1
git cherry-pick 108645d9e7d62e4f7d0df17d548d4074a4cbfc97  # trivial fix
git cherry-pick 85ebb482998ff76ce0c77d7049bebe6ebf8ddc65  # [REMOVE] folder migration #2788
git cherry-pick a80ee33fc207241a3e1e1546fd3ff3b123f8eb03  # Merge PR #2788 into 15.0
git cherry-pick f891dc40b6f489c769b6c8c59334c31db89f8872  # [FIX] l10n_br_base: Rename assets_backend file to avoid error.

The new fixed 15.0 branch is here 15.0-mig-l10n_br_base while I also saved a backup 15.0 branch here

@renatonlima @marcelsavegnago @antoniospneto podem testar essa nova branch para ver se podemos fazer o force push dela na 15.0 do OCA/l10n-brazil ?

[rvalyi]

reparam os ~500+ commits a mais que tavam faltando na 5.0: