This change updates the storagenode piecestore apis to expose access to
the full piece size stored on disk. Previously we only had access to
(and only kept a cache of) the content size used for all pieces. This
was inaccurate when reporting the amount of disk space used by nodes.
We now have access to the total content size, as well as the total disk
usage, of all pieces. The pieces cache also keeps a cache of the total
piece size along with the content size.
Change-Id: I4fffe7e1257e04c46021a2e37c5adc6fe69bee55
* add exit-status command
* remove todo and fix format
* fix status display
* change startExit to exit progress
* fix linting error
* add successful column in exit progress
* fix test
* remove extra new line
* fix TYPOS
* format the percentage better
