JSPWIKI-770:                                                            
- added custom auth, absolute URLs module for selenium execution
- moved common selenium execution configuration to custom profile, integration tests are launched only if -Pintegration-tests is given

git-svn-id: https://svn.apache.org/repos/asf/incubator/jspwiki/branches/MVN3_BRANCH@1484599 13f79535-47bb-0310-9956-ffa450edef68