Divide Cluster into Unique Partitions The change includes the following: - Fix passing NC stores to AsterixConfiguration. - Unify storage direcotry name in the instance level rather than the node level. - Divide the cluster into unique storage partitions based on the number of stores. - Refactored FileSplits and moved out of AqlMetadataProvider. - Make AsterixHyracksIntegrationUtil use the passed configuration file. - Make File Splits pass relative index paths of partitions rather than absolute paths. - Remove unused AqlCompiledMetadataDeclarations class.