JSPWIKI-770: renamed jspwiki-it-vanilla to jspwiki-it-test-custom

The webtests are still NOT passing though, there're still some things to do (i.e.: really enforce english locale on tomcat startup)

git-svn-id: https://svn.apache.org/repos/asf/incubator/jspwiki/branches/MVN3_BRANCH@1480804 13f79535-47bb-0310-9956-ffa450edef68