Reduce problem size for new cfd test

This used too much memory on bradc-lnx and timed out on chap03
last night.  Cathie OK'd ramping down to this problem size as
a workaround.
Merge pull request #607 from bradcray/reduce-cfd-probsize

Reduce problem size for new cfd test

This used too much memory on bradc-lnx and timed out on chap03
last night. Cathie OK'd ramping down to this problem size as
a workaround.