add .travis.yml
add .coveragerc
fix flakes8
fix typo error message
[IMP] account_invoice_production_lot: test error msg
[FIX] account_invoice_production_lot for compatibility with travis
See https://github.com/OCA/account-invoice-reporting/pull/6#issuecomment-48228764
Merge pull request #4 from yvaucher/7.0-travis-coverage

7.0 travis coverage