Add unit tests for the utility functions to convert between partition
names and partition ids.
Change-Id: I4b12f9d611cb9f3ce49909cda5cbcedd3e6c3d10
Reviewed-on: https://gerrit.openafs.org/13176
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Tested-by: Benjamin Kaduk <kaduk@mit.edu>