Added warning message in case you supply an empty string to the update
method of InfrastructureMetadata. The same has been done for Consistent
Hashing updates where an empty list or null is supplied. In those cases
the meta-data and hashing-circle will be set to empty and a warning will
be shown in the log.
Performance Evaluator. Work in progress.
Merge branch 'master' of ssh://git@github.com/TatrosRajSouza/ScalableStorageService.git