Fixed attribute nesting.
XD-2235 Allow 'security.basic.realm'

 - to control the security realm
Randomize props in BatchConfigurerIntegrationTests
XD-2247: Log version number in log files

Support for logging version number obtained from
"Implementation-Version" string in manifest file.
Version number is logged by adding "%v" to the
conversion pattern string.
XD-2226 ZooKeeper namespace is now configurable

The zk.namespace property can be set in servers.yml (default is "xd").

Also removed the buildWithNamespace() methods from Path implementations.
removed buildWithNamespace links from javadoc
added zk namespace to application.yml