Minor Sonar cleanups and some JSP tweaking on the startup page (preventing ability to create a blog without a user, and no second user until a blog is created, the latter one enforced later on by the app anyway.)

git-svn-id: https://svn.apache.org/repos/asf/roller/trunk@1510787 13f79535-47bb-0310-9956-ffa450edef68