pom.xml: corrected groupId
jspwiki-selenium-tests/pom.xml: fixed unclosed tag relativePath
jspwiki-it-vanilla/pom.xml: enforce english locale for IT tests

git-svn-id: https://svn.apache.org/repos/asf/incubator/jspwiki/branches/MVN3_BRANCH@1479704 13f79535-47bb-0310-9956-ffa450edef68