make the annotation processor more restrictive on the annotations it processes to try help the CI build on jdk 1.6 - thanks Babak! Also used java 7 source only to help further nudge the jdk 6 build along a bit more

git-svn-id: https://svn.apache.org/repos/asf/camel/trunk@1476897 13f79535-47bb-0310-9956-ffa450edef68