Fix some lint errors. (#272)

Author: DrMarcII

go/metadata/metadata.go

@@ -248,6 +248,8 @@ func (e extension) Normalize() error {
 	return nil
 }
 
+// ExtensionMap returns the Extension field as a map if, when the metadata was read,
+// no extension type was specified.
 func (m *Metadata) ExtensionMap() (map[string]interface{}, bool) {
 	if m.Extension == nil {
 		return nil, false

go/wtl/service/sauce/connect.go

@@ -143,6 +143,7 @@ func (c *Connect) monitor() {
 	portpicker.RecycleUnusedPort(c.port)
 }
 
+// Name is the name of this component used in error and log messages.
 func (c *Connect) Name() string {
 	return compName
 }