public String getClusterMode() {
		return getClusterProperties().getProperty(PROP_CLUSTER_MODE, "none");
	}
Initialize the {@link Config} object.
<p/>
This method mainly resolves ${NGRINDER_HOME} and loads system properties. In addition, the logger is initialized
and the default configuration files are copied into ${NGRINDER_HOME} if they do not exists.
ngrinder-controller/src/main/java/org/ngrinder/infra/config/Config.java