Processes the endpoint operational info from plugin

Closes #406
Signed-off-by: Mohammad Banikazemi <MBanikazemi@gmail.com>

drivers/remote/driver.go

@@ -8,6 +8,7 @@ import (
 	"github.com/docker/docker/pkg/plugins"
 	"github.com/docker/libnetwork/driverapi"
 	"github.com/docker/libnetwork/drivers/remote/api"
+	"github.com/docker/libnetwork/netlabel"
 	"github.com/docker/libnetwork/types"
 )
 
@@ -146,6 +147,9 @@ func (d *driver) EndpointOperInfo(nid, eid types.UUID) (map[string]interface{},
 	if err := d.call("EndpointOperInfo", info, &res); err != nil {
 		return nil, err
 	}
+	if val, ok := res.Value["MacAddress"]; ok {
+		res.Value[netlabel.MacAddress], _ = net.ParseMAC(val.(string))
+	}
 	return res.Value, nil
 }