Change CI to GitHub actions

Use copier template from oca/oca-addons-repo-template

Target Python3.7

Adapt modules to fix few issues

logging_json/__manifest__.py

@@ -11,7 +11,7 @@
  'external_dependencies': {
      'python': ['pythonjsonlogger'],
  },
- 'website': 'http://www.camptocamp.com',
+ 'website': 'https://github.com/camptocamp/odoo-cloud-platform',
  'data': [],
  'installable': True,
  }

logging_json/json_log.py

@@ -33,9 +33,9 @@ class OdooJsonFormatter(jsonlogger.JsonFormatter):
 
 
 if is_true(os.environ.get('ODOO_LOGGING_JSON')):
-    format = ('%(asctime)s %(pid)s %(levelname)s'
-              '%(dbname)s %(name)s: %(message)s')
-    formatter = OdooJsonFormatter(format)
+    format_str = ('%(asctime)s %(pid)s %(levelname)s'
+                  '%(dbname)s %(name)s: %(message)s')
+    formatter = OdooJsonFormatter(format_str)
     logging.getLogger().handlers[0].formatter = formatter