public String getFullyQualifiedId() {
			return String.format("%s.%s.%s.%d", getUnitName(), getModuleType(),
					getModuleLabel(), getIndex());
		}
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