some cleanup before merging trunk
- version goes to 2.9.2-SNAPSHOT
- added jspwiki-it-test-custom-jdbc selenium test executions, which wasn't as straightforward as I thought it would be
- some cleanup on jspwiki-it*/pom.xml 

git-svn-id: https://svn.apache.org/repos/asf/incubator/jspwiki/branches/MVN3_BRANCH@1486410 13f79535-47bb-0310-9956-ffa450edef68