Allow QuiteLogger to hide custom log level

By default we want to hide all messages except errors but in several cases
(like assert_ha_services_ready) we need to suppress error messages too.

Change-Id: I513c73055f0e517b308868b1cd500a185ea81be2
(cherry picked from commit 8c52fd4aef)

fuelweb_test/__init__.py

@@ -75,8 +75,13 @@ logwrap = debug(logger)
 class QuietLogger(object):
     """Reduce logging level while context is executed."""
 
+    def __init__(self, upper_log_level=logging.WARNING):
+        self.log_level = upper_log_level
+        self.storage = None
+
     def __enter__(self):
-        console.setLevel(logging.ERROR)
+        self.storage = console.level
+        console.setLevel(self.log_level + 1)
 
     def __exit__(self, exp_type, exp_value, traceback):
-        console.setLevel(logging.INFO)
+        console.setLevel(self.storage)

fuelweb_test/models/fuel_web_client.py

@@ -14,6 +14,7 @@
 
 from __future__ import division
 
+import logging
 import re
 import time
 import traceback
@@ -172,7 +173,7 @@ class FuelWebClient(object):
         if self.get_cluster_mode(cluster_id) == DEPLOYMENT_MODE_HA:
             logger.info('Waiting {0} sec. for passed OSTF HA tests.'
                         .format(timeout))
-            with QuietLogger():
+            with QuietLogger(logging.ERROR):
                 _wait(lambda: self.run_ostf(cluster_id,
                                             test_sets=['ha'],
                                             should_fail=should_fail),