During 7.0.0.CR1 build, there was a decision to remove transitive dependencies from other projects and exclude/ban them in jboss-as-parent.

This decision has effectively crippled usage of Maven Dependency Resolver, which wasn't used in CR1-date based testsuite, so the change passed silently.
If user wants to use the ShrinkWrap Dependency Resolver in the AS7 testsuite, he won't get the required transitive dependencies, such as wagon or aether, so the resolver is unusable.

According to disscussion with Vladimir, it would help "to flatten" dependency tree for ShrinkWrap dependency Resolver, however, that's only the part of the solution, the restrictions posed in AS7 parent must be relaxed afterwards.