Updating to 5.0.3-SNAPSHOT and adding 5.0.2 release info

git-svn-id: https://svn.apache.org/repos/asf/servicemix/website/trunk@1604102 13f79535-47bb-0310-9956-ffa450edef68
Switch to 4.5.4-SNAPSHOT

git-svn-id: https://svn.apache.org/repos/asf/servicemix/website/trunk@1604104 13f79535-47bb-0310-9956-ffa450edef68