Merge topic 'SystemTools-move-path-case-cache'

a241fd13 SystemTools: Remove caching from public GetActualCaseForPath
0a0974d0 SystemTools: Restore unconditional caching in GetActualCaseForPath

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Ben Boeckel <ben.boeckel@kitware.com>
Acked-by: Clinton Stimpson <clinton@elemtech.com>
Merge-request: !92