If set project password parameter and define default value and click on Save
button, that this value is not stored in config.xml for project.

I use actually this workaround:
store element <defaultValue>password</defaultValue> to
<hudson.model.PasswordParameterDefinition/> element and reload configuration.
But this sollusion has secuirty issue that password is in plain format.

Thanks for fix

Petr Prochazka