Continue work on geom* testcase integration

- Skip the tests if the geom class can't be loaded
- Install a Kyuafile
- Fix a typo in the graid3 Makefile
- Generate a Kyuafile so the geom classes get tested out
- Look for geom_subr.sh down another directory
- Import the gmirror and gpart testcases from Isilon (written by cpeel)

Sponsored-by: EMC / Isilon Storage Division