Filter /monitoring/status werkzeug logs

With healtchecks, they constitute 95% of our logs. Let's stop wasting
resources and shut them up.

monitoring_status/__init__.py

@@ -1,2 +1 @@
-
 from . import controllers

monitoring_status/controllers/main.py

@@ -1,6 +1,7 @@
 # Copyright 2016-2018 Camptocamp SA
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html)
 
+import logging
 import json
 
 import werkzeug
@@ -9,6 +10,21 @@ from odoo import http
 from odoo.addons.web.controllers.main import ensure_db
 
 
+class HealthCheckFilter(logging.Filter):
+
+    def __init__(self, path, name=''):
+        super().__init__(name)
+        self.path = path
+
+    def filter(self, record):
+        return self.path not in record.getMessage()
+
+
+logging.getLogger('werkzeug').addFilter(
+    HealthCheckFilter('"GET /monitoring/status HTTP/1.1"')
+)
+
+
 class Monitoring(http.Controller):
 
     @http.route('/monitoring/status', type='http', auth='none')