use odoo type for flake8

needed to avoid using flake8 for python 2 in odoo 11.0+

do_tests.py

@@ -189,9 +189,13 @@
         c.has_option('odoo_scripts', 'load-language') and
         c.get('odoo_scripts', 'load-language')) or None
     postgresql_version = (
-         c.has_section('odoo_scripts') and
-         c.has_option('odoo_scripts', 'postgresql_version') and
-         c.get('odoo_scripts', 'postgresql_version')) or '9.6'
+        c.has_section('odoo_scripts') and
+        c.has_option('odoo_scripts', 'postgresql_version') and
+        c.get('odoo_scripts', 'postgresql_version')) or '9.6'
+    odoo_type = (
+        c.has_section('odoo_scripts') and
+        c.has_option('odoo_scripts', 'odoo_type') and
+        c.get('odoo_scripts', 'odoo_type')) or 'odoo7'
     image = "%s/%s:latest" % (registry, project)
     _logger.debug("Docker image: %s", image)
     extensions = (
@@ -255,7 +259,7 @@
             args.append('--dbport')
             args.append(dbport)
 
-    docker_dev_start.flake8()
+    docker_dev_start.flake8(odoo_type)
     if start_postgresql:
         args.append('--start-postgresql')
     if recreate_db: