We don't have to use a function to get the backend name anymore

Previously we were using a function to compute the backend's name because we imported backend (and thus evaluating name) before parsing the configuration file.

We're not doing that anymore and in fact the executables have a more defined structure and we shouldn't move from it in the foreseeable future.

So I don't think we should use a function to compute the name's backend anymore.

assigned to @nicoe

added trytond type::performance + 1 deleted label

review258421002 updated at https://codereview.tryton.org/258421002/#ps264631002

added 1 deleted label and removed 1 deleted label

review258421002 updated at https://codereview.tryton.org/258421002/#ps262521003

review258421002 updated at https://codereview.tryton.org/258421002/#ps284491002

review258421002 updated at https://codereview.tryton.org/258421002/#ps286351002

review258421002 updated at https://codereview.tryton.org/258421002/#ps284501002

review258421002 updated at https://codereview.tryton.org/258421002/#ps274431002

New changeset e597f60d7e5a by Nicolas ?vrard in branch 'default':
Use direct access to backend classes
https://hg.tryton.org/modules/account/rev/e597f60d7e5a

added 1 deleted label and removed 1 deleted label

closed

New changeset 6aefa4fe2033 by Nicolas ?vrard in branch 'default':
Use direct access to backend classes
https://hg.tryton.org/modules/account_asset/rev/6aefa4fe2033

New changeset 7c25af4058ef by Nicolas ?vrard in branch 'default':
Use direct access to backend classes
https://hg.tryton.org/modules/account_credit_limit/rev/7c25af4058ef

New changeset d40e44ee0e81 by Nicolas ?vrard in branch 'default':
Use direct access to backend classes
https://hg.tryton.org/modules/account_dunning/rev/d40e44ee0e81

New changeset f01a31d5af43 by Nicolas ?vrard in branch 'default':
Use direct access to backend classes
https://hg.tryton.org/modules/account_invoice/rev/f01a31d5af43

New changeset b1e3f68f3aba by Nicolas ?vrard in branch 'default':
Use direct access to backend classes
https://hg.tryton.org/modules/account_payment/rev/b1e3f68f3aba

New changeset 54b8e79f4588 by Nicolas ?vrard in branch 'default':
Use direct access to backend classes
https://hg.tryton.org/modules/account_payment_sepa/rev/54b8e79f4588

New changeset 8c0274f3a979 by Nicolas ?vrard in branch 'default':
Use direct access to backend classes
https://hg.tryton.org/modules/account_product/rev/8c0274f3a979

New changeset e395331643bc by Nicolas ?vrard in branch 'default':
Use direct access to backend classes
https://hg.tryton.org/modules/account_statement/rev/e395331643bc