[maven-release-plugin] prepare release activemq-cpp-3.7.0

git-svn-id: https://svn.apache.org/repos/asf/activemq/activemq-cpp/trunk@1481871 13f79535-47bb-0310-9956-ffa450edef68
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.apache.org/repos/asf/activemq/activemq-cpp/trunk@1481873 13f79535-47bb-0310-9956-ffa450edef68