find() should return -1 if nothing is found

The reason that this doesn't work on `num_tokens` of 1 is because the find here is looking for the `Token` line to *NOT* be the first line in the `nodetool info -T` output.  When you set the conditional to only fail on a find() response of -1, then the `num_tokens:1` scenario will work (like Solr or Analytics clusters).