[FIX] tests: detect coverage and adjust timeout

When computing coverage, the tests are slowed down and the timeout is
often exceeded.

With this commit, HttpCase headless Chrome tests timeout is increased if
coverage is detected.

odoo/tests/common.py

@@ -7,6 +7,7 @@ helpers and classes to write tests.
 import base64
 import collections
 import importlib
+import inspect
 import itertools
 import json
 import logging
@@ -789,6 +790,9 @@ class HttpCase(TransactionCase):
 
         If neither are done before timeout test fails.
         """
+        # increase timeout if coverage is running
+        if any(f.filename.endswith('/coverage/execfile.py') for f in inspect.stack()  if f.filename):
+            timeout = timeout * 1.5
         self.start_browser(self._logger)
 
         try: