store path tracking as byte buffer to avoid memory usage

git-svn-id: https://svn.apache.org/repos/asf/incubator/sirona/trunk@1573842 13f79535-47bb-0310-9956-ffa450edef68
start working on path tracking reporting

git-svn-id: https://svn.apache.org/repos/asf/incubator/sirona/trunk@1573843 13f79535-47bb-0310-9956-ffa450edef68
fix reporting unit test issues with adding an easy to setup DefaultPathTrackingDataStore

git-svn-id: https://svn.apache.org/repos/asf/incubator/sirona/trunk@1573844 13f79535-47bb-0310-9956-ffa450edef68
send directly data to remote storage, do not disconnect httpurl connection to be able to reuse connections and not creating so many sockets

git-svn-id: https://svn.apache.org/repos/asf/incubator/sirona/trunk@1573845 13f79535-47bb-0310-9956-ffa450edef68