TS: Add properties "jbossas.ts.integ.dir", "jbossas.ts.dir", "jbossas.project.dir" and use them in test.

Instead of implying that the test runs in certain subdirectory of the testsuite, define use these System variables passed to Surefire:

"jbossas.ts.integ.dir", "jbossas.ts.dir", "jbossas.project.dir"