move some db mocking to conftest

test/conftest.py

 import ast
+import contextlib
 import json
 import netifaces
 import os
@@ -184,6 +185,11 @@ def mocked_netifaces(mocker):
     mocker.patch('netifaces.ifaddresses', lambda n: data[n])
 
 
+@contextlib.contextmanager
+def _mocked_db_connection(ignored):
+    yield None
+
+
 @pytest.fixture
 def mocked_worker_module(
         mocker, mocked_redis, data_config_filename,
@@ -205,3 +211,13 @@ def mocked_worker_module(
     mocker.patch(
         'inventory_provider.juniper.load_config',
         _mocked_load_juniper_netconf_config)
+
+    def _mocked_get_service_users(cx, service_ids):
+        for id in service_ids:
+            yield {'service_id': id, 'user': 'AAAAA'}
+            yield {'service_id': id, 'user': 'BBBB'}
+
+    mocker.patch('inventory_provider.db.db.connection', _mocked_db_connection)
+    mocker.patch(
+        'inventory_provider.db.opsdb.get_service_users',
+        _mocked_get_service_users)

test/test_worker_utils.py

@@ -21,28 +21,12 @@ def backend_db():
     }).db
 
 
-
-@contextlib.contextmanager
-def mocked_connection(ignored):
-    yield None
-
-def test_build_interface_services(mocker, mocked_worker_module):
+def test_build_interface_services(mocked_worker_module):
     """
     checks that valid interface service objects are created
     :param mocked_worker_module: fixture
     :return:
     """
-
-    def _mocked_get_service_users(cx, service_ids):
-        for id in service_ids:
-            yield {'service_id': id, 'user': 'AAAAA'}
-            yield {'service_id': id, 'user': 'BBBB'}
-
-    mocker.patch('inventory_provider.db.db.connection', mocked_connection)
-    mocker.patch(
-        'inventory_provider.db.opsdb.get_service_users',
-        _mocked_get_service_users)
-
     ifc_schema = {
         '$schema': 'http://json-schema.org/draft-07/schema#',
         'type': 'object',