9 azure backport (#353)

* fix: backport fix + backport modules to azure

monitoring_prometheus/controllers/__init__.py

@@ -0,0 +1,2 @@
+from __future__ import absolute_import
+from . import prometheus_metrics

monitoring_prometheus/controllers/prometheus_metrics.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Copyright 2016-2021 Camptocamp SA
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html)
+from __future__ import absolute_import
+import logging
+
+from openerp.http import Controller, route
+
+_logger = logging.getLogger(__name__)
+
+try:
+    from prometheus_client import generate_latest
+except (ImportError, IOError), err:
+    _logger.warning(err)
+
+
+class PrometheusController(Controller):
+    @route(u'/metrics', auth=u'public')
+    def metrics(self):
+        return generate_latest()