Implemented oom_score_adj

Signed-off-by: George Lester <glester491@gmail.com>

tests/integration/service_test.py

@@ -854,6 +854,11 @@ class ServiceTest(DockerClientTestCase):
         container = create_and_start_container(service)
         self.assertEqual(container.get('HostConfig.RestartPolicy.Name'), 'always')
 
+    def test_oom_score_adj_value(self):
+        service = self.create_service('web', oom_score_adj=500)
+        container = create_and_start_container(service)
+        self.assertEqual(container.get('HostConfig.OomScoreAdj'), 500)
+
     def test_restart_on_failure_value(self):
         service = self.create_service('web', restart={
             'Name': 'on-failure',

tests/unit/config/config_test.py

@@ -1243,6 +1243,26 @@ class ConfigTest(unittest.TestCase):
             }
         ]
 
+    def test_oom_score_adj_option(self):
+
+        actual = config.load(build_config_details({
+            'version': '2',
+            'services': {
+                'web': {
+                    'image': 'alpine',
+                    'oom_score_adj': 500
+                }
+            }
+        }))
+
+        assert actual.services == [
+            {
+                'name': 'web',
+                'image': 'alpine',
+                'oom_score_adj': 500
+            }
+        ]
+
     def test_merge_service_dicts_from_files_with_extends_in_base(self):
         base = {
             'volumes': ['.:/app'],