[ADD] New module to make default expense account as non-required.

account_no_default/README.rst

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+=====================================
+Purchase Account Journal Modification
+=====================================
+
+.. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Beta
+.. |badge2| image:: https://img.shields.io/badge/licence-AGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+    :alt: License: AGPL-3
+.. |badge3| image:: https://img.shields.io/badge/github-OCA%2Fpurchase--workflow-lightgray.png?logo=github
+    :target: https://github.com/OCA/purchase-workflow/tree/14.0/purchase_account_journal_modification
+    :alt: OCA/purchase-workflow
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/purchase-workflow-14-0/purchase-workflow-14-0-purchase_account_journal_modification
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runbot-Try%20me-875A7B.png
+    :target: https://runbot.odoo-community.org/runbot/142/14.0
+    :alt: Try me on Runbot
+
+|badge1| |badge2| |badge3| |badge4| |badge5| 
+
+In previous versions of Odoo, the system did not require a default expense account. We would like to investigate the feasibility of a simple solution of just making this field not-required once again in v14.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/purchase-workflow/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us smashing it by providing a detailed and welcomed
+`feedback <https://github.com/OCA/purchase-workflow/issues/new?body=module:%20purchase_account_journal_modification%0Aversion:%2014.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+~~~~~~~
+
+* Open Source Integrators
+
+Contributors
+~~~~~~~~~~~~
+
+* Daniel Reis <dreis@opensourceintegrators.com>
+* Chandresh Thakkar <cthakkr@opensourceintegrators.com>
+
+Maintainers
+~~~~~~~~~~~
+
+This module is maintained by the OCA.
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+This module is part of the `OCA/purchase-workflow <https://github.com/OCA/purchase-workflow/tree/14.0/purchase_account_journal_modification>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

account_no_default/__manifest__.py

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+# Copyright (C) 2020 Open Source Integrators
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+{
+    "name": "No Default Account",
+    "version": "14.0.1.0.0",
+    "development_status": "Beta",
+    "author": "Open Source Integrators, Odoo Community Association (OCA)",
+    "maintainers": ["dreispt"],
+    "summary": "Remove default expense account for vendor bills journal",
+    "website": "https://github.com/OCA/account-financial-tools",
+    "license": "AGPL-3",
+    "depends": ["account"],
+    "category": "Accounting/Accounting",
+    "data": [
+        "views/account_journal_views.xml",
+    ],
+    "installable": True,
+}

account_no_default/readme/CONTRIBUTORS.rst

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+* Daniel Reis <dreis@opensourceintegrators.com>
+* Chandresh Thakkar <cthakkr@opensourceintegrators.com>

account_no_default/readme/DESCRIPTION.rst

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+In previous versions of Odoo, the system did not require a default expense account. We would like to investigate the feasibility of a simple solution of just making this field not-required once again in v14.

account_no_default/views/account_journal_views.xml

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+<odoo>
+    <record id="view_account_journal_form_inherit" model="ir.ui.view">
+        <field name="name">view.account.journal.form.inherit</field>
+        <field name="model">account.journal</field>
+        <field name="inherit_id" ref="account.view_account_journal_form" />
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='default_account_id'][4]" position="attributes">
+                <attribute name="attrs">{'required': False}</attribute>
+            </xpath>
+        </field>
+    </record>
+</odoo>

setup/account_no_default/odoo/addons/account_no_default

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+../../../../account_no_default

setup/account_no_default/setup.py

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+import setuptools
+
+setuptools.setup(
+    setup_requires=['setuptools-odoo'],
+    odoo_addon=True,
+)