Reformat common to standardized format

Change-Id: I9ba54f3510e17de285e1e774d18ee5c7205818ad
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/osm_common/tests/test_msgbase.py b/osm_common/tests/test_msgbase.py
index 9c6c3c5..665968e 100644
--- a/osm_common/tests/test_msgbase.py
+++ b/osm_common/tests/test_msgbase.py
@@ -49,26 +49,36 @@
 def test_write(msg_base):
     with pytest.raises(MsgException) as excinfo:
         msg_base.write("test", "test", "test")
-    assert str(excinfo.value).startswith(exception_message("Method 'write' not implemented"))
+    assert str(excinfo.value).startswith(
+        exception_message("Method 'write' not implemented")
+    )
     assert excinfo.value.http_code == http.HTTPStatus.INTERNAL_SERVER_ERROR
 
 
 def test_read(msg_base):
     with pytest.raises(MsgException) as excinfo:
         msg_base.read("test")
-    assert str(excinfo.value).startswith(exception_message("Method 'read' not implemented"))
+    assert str(excinfo.value).startswith(
+        exception_message("Method 'read' not implemented")
+    )
     assert excinfo.value.http_code == http.HTTPStatus.INTERNAL_SERVER_ERROR
 
 
 def test_aiowrite(msg_base, event_loop):
     with pytest.raises(MsgException) as excinfo:
-        event_loop.run_until_complete(msg_base.aiowrite("test", "test", "test", event_loop))
-    assert str(excinfo.value).startswith(exception_message("Method 'aiowrite' not implemented"))
+        event_loop.run_until_complete(
+            msg_base.aiowrite("test", "test", "test", event_loop)
+        )
+    assert str(excinfo.value).startswith(
+        exception_message("Method 'aiowrite' not implemented")
+    )
     assert excinfo.value.http_code == http.HTTPStatus.INTERNAL_SERVER_ERROR
 
 
 def test_aioread(msg_base, event_loop):
     with pytest.raises(MsgException) as excinfo:
         event_loop.run_until_complete(msg_base.aioread("test", event_loop))
-    assert str(excinfo.value).startswith(exception_message("Method 'aioread' not implemented"))
+    assert str(excinfo.value).startswith(
+        exception_message("Method 'aioread' not implemented")
+    )
     assert excinfo.value.http_code == http.HTTPStatus.INTERNAL_SERVER_ERROR