[FIX] pylint relative imports
[FIX] pylint redefined-outer-name
[FIX] pylint W0105(pointless-string-statement)
[FIX] pylint regexp raw string
Merge pull request #81 from acsone/7.0-pylint-sbi

7.0 pylint
[FIX] account_move_validation_improvement: order by date