data_dir/break_scylla.sh: Only remove non system keyspace information
data_dir/break_scylla.sh: Only remove non system keyspace information

Signed-off-by: Shlomi Livne <6f01bf2e882e3bb6371d28d1418e5f729e7183e6@scylladb.com>

amoskong/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,amoskong/scylla-cluster-tests,scylladb/scylla-longevity-tests,amoskong/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,amoskong/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,amoskong/scylla-cluster-tests