SLING-3273 : Switch to login page if user is not allowed to access the web console

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1549760 13f79535-47bb-0310-9956-ffa450edef68
SLING-3273 : Switch to login page if user is not allowed to access the web console

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1549762 13f79535-47bb-0310-9956-ffa450edef68