Add support to suppress bot notifications

* Similar to suppress-graph

There are some gate failures that are expected and are real errors (such
as global-requirements mismatches in requirements jobs).
suppress-notifications allows us to classify these failures and remove
them from the unclassified page while not telling developers to recheck.

This can be used along with suppress-graph.

Change-Id: I6d905ba65e66e799a65598f8a5d5c3dd684feb8c

README.rst

@@ -60,6 +60,11 @@ Guidelines for good queries:
 
    (build_name:"gate-nova-python26" OR build_name:"gate-nova-python27")
 
+When adding queries you can optionally suppress the creation of graphs
+and notifications by adding ``suppress-graph: true`` or
+``suppress-notifcation: true`` to the yaml file.  These can be used to make
+sure expected failures don't show up on the unclassified page.
+
 In order to support rapidly added queries, it's considered socially acceptable
 to approve changes that only add 1 new bug query, and to even self approve
 those changes by core reviewers.

elastic_recheck/elasticRecheck.py

@@ -385,6 +385,8 @@ class Classifier():
         self.queries = loader.load(self.queries_dir)
         bug_matches = []
         for x in self.queries:
+            if x.get('suppress-notification'):
+                continue
             self.log.debug(
                 "Looking for bug: https://bugs.launchpad.net/bugs/%s"
                 % x['bug'])

elastic_recheck/tests/unit/suppressed_queries/1410969.yaml

@@ -0,0 +1,8 @@
+# this is a placeholder bug and should not be removed if there are no hits
+query: >
+  message:"Requirement"
+  AND message:"does not match openstack/requirements value"
+  AND tags:"console"
+  AND build_queue:"gate"
+suppress-graph: true
+suppress-notification: true

elastic_recheck/tests/unit/test_suppress_notifications.py

@@ -0,0 +1,31 @@
+#   Licensed under the Apache License, Version 2.0 (the "License"); you may
+#   not use this file except in compliance with the License. You may obtain
+#   a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#   WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#   License for the specific language governing permissions and limitations
+#   under the License.
+
+import mock
+
+from elastic_recheck import elasticRecheck
+from elastic_recheck import tests
+
+
+class TestSuppressNotifcation(tests.TestCase):
+
+    def setUp(self):
+        super(TestSuppressNotifcation, self).setUp()
+        self.classifier = elasticRecheck.Classifier(
+            "./elastic_recheck/tests/unit/suppressed_queries")
+
+    @mock.patch('elastic_recheck.query_builder.single_patch')
+    @mock.patch('elastic_recheck.results.SearchEngine.search')
+    def test_basic_parse(self, mock1, mock2):
+        self.classifier.classify(None, None, None)
+        self.assertFalse(mock1.called)
+        self.assertFalse(mock2.called)