[12.0][MIG] Migrate module sql_request_abstract to v12

sql_request_abstract/readme/CONTRIBUTORS.rst

@@ -0,0 +1,2 @@
+* Florian da Costa <florian.dacosta@akretion.com>
+* Sylvain LE GAL (https://twitter.com/legalsylvain)

sql_request_abstract/readme/DESCRIPTION.rst

@@ -0,0 +1,20 @@
+This module provides an abstract model to manage SQL Select requests on database.
+It is not usefull for itself. You can see an exemple of implementation in the
+'sql_export' module. (same repository).
+
+Implemented features
+~~~~~~~~~~~~~~~~~~~~
+
+* Add some restrictions in the sql request:
+    * you can only read datas. No update, deletion or creation are possible.
+    * some tables are not allowed, because they could contains clear password
+      or keys. For the time being ('ir_config_parameter').
+
+* The request can be in a 'draft' or a 'SQL Valid' status. To be valid,
+  the request has to be cleaned, checked and tested. All of this operations
+  can be disabled in the inherited modules.
+
+* This module two new groups:
+    * SQL Request / User : Can see all the sql requests by default and execute
+      them, if they are valid.
+    * SQL Request / Manager : has full access on sql requests.

sql_request_abstract/readme/USAGE.rst

@@ -0,0 +1,11 @@
+Inherit the model:
+
+    from odoo import models
+
+    class MyModel(models.model)
+        _name = 'my.model'
+        _inherit = ['sql.request.mixin']
+
+        _sql_request_groups_relation = 'my_model_groups_rel'
+
+        _sql_request_users_relation = 'my_model_users_rel'