by default, don't download stuff we only need for the integration tests
Merge branch 'integration_tests_all-itests_2' of github.com:nickboldt/jbosstools-server into integration_tests_all-itests_2
move shared config from plugins' pom.xml into itests/pom.xml
remove extraneous systemProperties line (subset) and add a couple more entries for jbosstools.test.jre.6 and jbosstools.test.jre.8