[IMP] util.modules: new hack to force the execution of upgrade scripts

Allow ``_force_upgrade_of_fresh_module`` in upgrade-util to force the execution
of upgrade script for new install modules
Unlike the old hack where
1. ``module_node.init`` can be changed by ``_force_upgrade_of_fresh_module``
   through changing the global ``config['init']``.
2. ``module_node.init`` was propagated only through one of the longest module
   dependency path.
The new hack uses a new explicit variable ``registry._force_upgrade_scripts``
without changing the global ``config``.

odoo/odoo#189000

closes #176

Signed-off-by: Raphael Collet <rco@odoo.com>

src/util/modules.py

@@ -895,6 +895,11 @@ def _force_upgrade_of_fresh_module(cr, module, init, version):
     # Low level implementation
     # Force module state to be in `to upgrade`.
     # Needed for migration script execution. See http://git.io/vnF7f
+    if version_gte("saas~18.2") and init:
+        env_ = env(cr)
+        env_.registry._force_upgrade_scripts.add(module)
+        return
+
     cr.execute(
         """
             UPDATE ir_module_module