Update the integration test.

Author: wrouesnel

postgres_exporter_integration_test.go

@@ -30,7 +30,7 @@ func (s *IntegrationSuite) SetUpSuite(c *C) {
 dsn := os.Getenv("DATA_SOURCE_NAME")
 c.Assert(dsn, Not(Equals), "")
 
-exporter := NewExporter(dsn)
+exporter := NewExporter(dsn, "")
 c.Assert(exporter, NotNil)
 // Assign the exporter to the suite
 s.e = exporter