Eliminiate run length atf config variables from the ZFS test suite
tests/sys/cddl/zfs/tests/.../*_test.sh
Remove 'atf_set "require.config" rt_(short|medium|long)' statements.
They were intended to provide a quicker version of the ZFS test
suite with reduced coverage. But they never worked very well, and
Kyua 0.12 chokes on many of them (it doesn't allow multiple
require.config lines for a single test case)
Sponsored by: Spectra Logic Corp