[maven-release-plugin] prepare release apollo-project-1.6

git-svn-id: https://svn.apache.org/repos/asf/activemq/activemq-apollo/trunk@1448295 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/activemq/activemq-apollo/trunk@1448297 13f79535-47bb-0310-9956-ffa450edef68