Do not run unique instance test
Do not run unique instance test

It has an unpleasant tendency to hang, most likely because the
second stratisd instance starts up before the first has locked the
lock file.

We will fix and expand the test in future, but at this time running it is
not worth the inconvenience.

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

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