Pep8, pylint fixes.

quantum/plugins/cisco/common/cisco_constants.py

@@ -41,6 +41,7 @@ PPDEFAULT = 'default'
 VLANID = 'vlan_id'
 VLANNAME = 'vlan_name'
 PORTPROFILENAME = 'portprofile_name'
+QOS='qos'
 
 ATTACHMENT = 'attachment'
 PORT_ID = 'port-id'

quantum/plugins/cisco/db/ucs_db.py

@@ -371,3 +371,16 @@ def update_portbinding(port_id, blade_intf_dn=None, portprofile_name=None,
         return port_binding
     except exc.NoResultFound:
         raise c_exc.PortVnicNotFound(port_id=port_id)
+
+
+def get_portbinding_dn(blade_intf_dn):
+    """Lists a port binding"""
+    LOG.debug("get_portbinding_dn() called")
+    session = db.get_session()
+    try:
+        port_binding = session.query(ucs_models.PortBinding).\
+          filter_by(blade_intf_dn=blade_intf_dn).\
+          one()
+        return port_binding
+    except exc.NoResultFound:
+        return []