simplify "indexOf(x) >= 0" to "contains(x)"

git-svn-id: http://h2database.googlecode.com/svn/trunk@5712 e6896862-9d19-0410-bfb3-e9fa5d50e656
update unit test for recent code re-arranging by Thomas

git-svn-id: http://h2database.googlecode.com/svn/trunk@5713 e6896862-9d19-0410-bfb3-e9fa5d50e656
fix javadoc

git-svn-id: http://h2database.googlecode.com/svn/trunk@5714 e6896862-9d19-0410-bfb3-e9fa5d50e656
fix imports

git-svn-id: http://h2database.googlecode.com/svn/trunk@5715 e6896862-9d19-0410-bfb3-e9fa5d50e656
remove dead code

git-svn-id: http://h2database.googlecode.com/svn/trunk@5716 e6896862-9d19-0410-bfb3-e9fa5d50e656
remove more dead code

git-svn-id: http://h2database.googlecode.com/svn/trunk@5717 e6896862-9d19-0410-bfb3-e9fa5d50e656