Fix pylint errors

Author: avara1986

pyms/flask/healthcheck/__init__.py

@@ -1,3 +1 @@
 from pyms.flask.healthcheck.healthcheck import healthcheck_blueprint
-
-__all__ = ['healthcheck_blueprint']

pyms/flask/services/driver.py

@@ -16,7 +16,7 @@ def __init__(self, service, *args, **kwargs):
 
     def __getattr__(self, attr, *args, **kwargs):
         config_attribute = getattr(self.config, attr)
-        return config_attribute if config_attribute is "" or config_attribute != {} else self.default_values.get(attr,
+        return config_attribute if config_attribute == "" or config_attribute != {} else self.default_values.get(attr,
                                                                                                                  None)