- Since these tests all want a system object, and a GS
with a sensible setup, give them one with its own initTestCase().
This could have been done with one executable, running tests from
multiple classes, but there's not much overall benefit there.
- My usual test environment has umask set to 022, but on one dev
box it is 002, leading to test failures (which show the test
was bad, not that the umask-setting code is bad)
