@Override
		public int hashCode() {
			int result = containerId != null ? containerId.hashCode() : 0;
			result = 31 * result + (unitName != null ? unitName.hashCode() : 0);
			result = 31 * result + (moduleType != null ? moduleType.hashCode() : 0);
			result = 31 * result + (moduleLabel != null ? moduleLabel.hashCode() : 0);
			result = 31 * result + index;
			return result;
		}
Return the "fully qualified" id string for the module instance
this metadata object is tracking. The format for this string is
"deploymentUnitName.type.label.index", for example "ticktock.sink.log.1".

@return fully qualified id string
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/module/store/ModuleMetadata.java