[maven-release-plugin] prepare release 1.5-rc1

git-svn-id: https://svn.apache.org/repos/asf/tika/trunk@1564573 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/tika/trunk@1564580 13f79535-47bb-0310-9956-ffa450edef68