update build.xml / test environment:
- cleanup of build.xml
- update junit 4.6 to junit 4.11
- update unitils 3.1 to 3.3
- remove old junit 4.4 from unitils cots
- add jacoco 0.6.4
- `test` target now produces test coverage data to `test/jacoco.exec`, can be used by sonar
- `test-html` now produces test coverage report to `test/report/html/jacoco`

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6133 0c6e7542-c601-0410-84e7-c038aed88b3b
forgot old statement

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6134 0c6e7542-c601-0410-84e7-c038aed88b3b