travis config: remove call to travis_run_flake8
[ADD] Add return on _get_comp default function
Merge pull request #58 from adrienpeiffer/patch-1

[ADD] Add return on _get_comp default function
Add missing security on `credit.control.dunning.fees.computer`
Merge pull request #60 from nbessi/add_dunning_fees_security

[FIX] account_credit_control_dunning_fees: Add missing security on `credit.control.dunning.fees.computer`
[IMP] refactor account_partner_required

* extention points for policies
* use constraints for readbility and robustness
[IMP] account_partner_required: make test use [ids] for write

Some other modules such as account_constraints require it.
[IMP] .travis.yml account_partner_required test now works around account_constraints

Therefore we can lighten the EXCLUDE/INCLUDE dance.

Signed-off-by: Stéphane Bidoul <stephane.bidoul@acsone.eu>
[FIX] account_partner_required: constraint depends on account_id
[FIX] pep8
[FIX] account_partner_required: constraint also depends on debit and credit