${hdp.version} won't resolve

I have a custom yarn application that doesn’t seem to work with hortonworks 2.2 because the ${hdp.version} variable doesn’t resolve. I get an error something like this:

Illegal character in path at index 11: /hdp/apps/${hdp.version}/mapreduce/mapreduce.tar.gz#mr-framework

I’m just wondering if there is a workaround for this until it gets addressed.

Thanks for any help/ideas you guys have.