WFLY-3361 - IBM JDK's XSL transformer behavior causes invalid config XMLs in some cases

After some discussion with @zebrik I am trying another approach to WFLY-3361.

This commit:
- reverts https://github.com/wildfly/wildfly/pull/6273
- add dependency to xalan to both maven xml and antrun plugins to use the same XML processor for XSLT transforms on all platforms
- update templates