Add a test for setup
Add a test for setup

This borrows substantially from the previously eliminated parts of the
test in the backstore module.

Signed-off-by: mulhern <7b51bcf507bcd7afb72bf8663752c0ddbeb517f6@redhat.com>

stratis-storage/stratisd,stratis-storage/stratisd,stratis-storage/stratisd