Allow specifying properties with arguments even if default resolution fails

[ptrdom]

Currently in the case of maven properties, if the property fails to resolve within the defaults - for example, if artifact is not released yet - then even if argument for a property exists it won't be resolved and template processing fails. I would be useful if default value resolution would be delayed and would only fail if there is no argument provided to override the default.

If such improvement would be accepted, I could work on implementing it.