Updated copyright year as preparation for release.

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1522951 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare release org.apache.felix.http-3

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1522959 13f79535-47bb-0310-9956-ffa450edef68