WFLY-2813 testsuite/integration pom fixes

WFLY-2813
* enable help:* goals in build.sh
* remove duplication and discrepancy of help profile between testsuite and testsuite/integration
* enable help profile by default in testsuite/pom.xml (why is it a profile at all btw?)
* fix inheritance of xml-maven-plugin in testsuite/integration module and submodules (fixes IP and logging configuration)