locksrv/checkparcel: Completeness test fixes
locksrv/checkparcel: Completeness test fixes

- When checking the most recent parcel version for completeness, report an
error if an expected chunk directory does not exist

- Properly handle the case in which the number of chunks in the parcel is
not an even multiple of CHUNKSPERDIR

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr