STYLE: Make test less verbose

Reduce the verbosity of the default test run via ctest.

Change-Id: If5568c610fe9971ac3491620fba87bbd233f11d4
ENH: Reduce grid size to 10x10x10

Changed whole grid extent to be a 10x10x10 grid in order
to reduce the memory footprint of this test, which was
causing failures on the AIX dashboard. The test now
partitions the grid to 4 blocks and uses 1 layer of ghost cells
to check the integrity of the ghost-layer/ghost-array generation.

Change-Id: Ibb4b8418bd3c8b683b342b4c08f0e5753e37a331
Merge topic 'fix-TestStructuredGridConnectivity-on-AIX' into master

b5b1ae69 ENH: Reduce grid size to 10x10x10
969c6bc4 STYLE: Make test less verbose