The recent wildfly-swarm version uses only remote maven repositories for dependency resolving. It naturally hangs up when running integration tests for me.
I use 2016.8.1 as a fallback now. However, it still does try resolving dependencies first from remote repositories. The dependency artifacts are only local on my machine, because I don't have a artifact repository at my hand right now.
Maybe a good approach would be to resolve locally first and then remote in case needed. To be honest I don't know if this issue is on your side or not.