simplify build.xml: specialization for test.lib.dir and test-lib resolution are no longer needed, since they're now defined in ../contrib-build.xml (merged trunk r1626429)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_5x@1626430 13f79535-47bb-0310-9956-ffa450edef68
ignore IntelliJ *.iml files put in place by 'ant idea' (merged trunk r1626431)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_5x@1626433 13f79535-47bb-0310-9956-ffa450edef68