[jboss-dev] Update AS build to Maven 3

[Paul Gier]

I've done some testing using Maven 3 for the AS build, and it seems to be
working fine now.  If there are no objections, I will update the AS trunk build
to Maven 3-beta-1.

Some of the advantages of Maven 3 include:
- Improved logging and error messages
- Some fixes related to dependency resolution when using "import" scope
- Fixes related to classloading