add assert for housekeeping.uuid
add assert for housekeeping.uuid

Raise error when housekeeping.uuid doesn't exist, the uuid file should be
generated in scylla setup stage.

Signed-off-by: Amos Kong <eb01d8f828a6c9a20be4534e72e049aaf41503df@scylladb.com>

scylladb/scylla-artifact-tests,scylladb/scylla-artifact-tests