adding flake 8 test

Change-Id: Ieeb1621aa615075ee16fe1b41a77a589b6e30784
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/osm_common/tests/test_msgbase.py b/osm_common/tests/test_msgbase.py
index 4db3997..c4d2dd6 100644
--- a/osm_common/tests/test_msgbase.py
+++ b/osm_common/tests/test_msgbase.py
@@ -7,40 +7,47 @@
 def exception_message(message):
     return "messaging exception " + message
 
+
 @pytest.fixture
 def msg_base():
     return MsgBase()
 
+
 def test_constructor():
     msgbase = MsgBase()
-
-    assert msgbase != None
+    assert msgbase is not None
     assert isinstance(msgbase, MsgBase)
 
+
 def test_connect(msg_base):
     msg_base.connect(None)
 
+
 def test_disconnect(msg_base):
     msg_base.disconnect()
 
+
 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 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 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"))
     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))