Bulk Operation

HDDS-48 Add updateDeleteTransactionId

HDDS-48 Remove singleton for Handler

HDDS-48 Handle Container Already Exists exception on client side

HDDS-48 Single lock to synchronize KeyValueContainer#update

HDDS-48 Add a create container Lock

HDDS-48 Add metrics to HddsDispatcher

HDDS-48 Modify Integration tests for new ContainerIO classes

HDDS-48 Integrate Volumeset, ContainerSet and HddsDispatcher

HDDS-48 CleanUp Reimplemented classes

HDDS-48 Add keyCount and container maximum size to ContainerData

HDDS-48 Refactor Dispatcher and implement Handler for new ContainerIO design

HDDS-48 Add Volume IO Stats

HDDS-48 Refactor KeyManager, ChunkManager

HDDS-48 Implement HDDSVolume to manage volume state

HDDS-48 Implement KeyValueContainer and adopt new disk layout for the containers

HDDS-48 Add DU usage to VolumeInfo

HDDS-48 Rename dbPath,containerFilePath

HDDS-48 Change format of .container files to Yaml

HDDS-48 ContainerSet class to manage ContainerMap

HDDS-48 Implement VolumeSet to manage disk volumes

HDDS-48 Create Version File in Datanode

HDDS-48 Use DBType during parsing datanode .container files

HDDS-48 Create ContainerData, Container classes

HDDS-48 Merge ContainerData and ContainerStatus classes

HDDS-48 Send ContainerType to Datanode during container creation

HDDS-48 Remove .meta file during creation of container