JBIDE-17175 org.jboss.tools.jst.web.kb.test tests failure on Windows

Fixed:
testJQMLoadedViaJs(org.jboss.tools.jst.web.kb.test.JQueryDataTest): No proposals found
testJQMLoadedViaJs(org.jboss.tools.jst.web.kb.test.JQueryDataTest14): No proposals found
testKbModelWithSeveralJarCopies(org.jboss.tools.jst.web.kb.test.KbModelWithSeveralJarCopiesTest)