[IMP] registry.py: Log info instead of warning about dropped view during installation

This problem appears when the module l10n_be_hr_payroll_fleet is installed with the
dynamic report for employees (enterprise module hr_contract_reports).

This module inherits from hr.contract and will create and modify some fields.

By modifying contract's table, PostgreSQL will drop the view from
hr_contract_employee_report. At the end of the installation, PostgreSQL will
check if tables exist, it isn't the case for the view from
hr_contract_employee_report, so it will recreate it.

It's the normal behavior.

But when a table is missing, a warning is logged and create problem with
Runbot. For this reason, it's better to log an Info and not a Warning message.

Validated with @rco

odoo/modules/registry.py

@@ -316,7 +316,7 @@ class Registry(Mapping):
 
         if missing_tables:
             missing = {table2model[table] for table in missing_tables}
-            _logger.warning("Models have no table: %s.", ", ".join(missing))
+            _logger.info("Models have no table: %s.", ", ".join(missing))
             # recreate missing tables following model dependencies
             deps = {name: model._depends for name, model in env.items()}
             for name in topological_sort(deps):