Improve name of test to fix for #623 indicating fresh row.

Author: Feras A Saad

tests/test_loom_simulate_bivariate_gaussian.py

@@ -123,7 +123,7 @@ def test_mix_ratio(seed):
 
 @pytest.mark.xfail(strict=True, reason='no populate data for new row, #623.')
 @stochastic(max_runs=1, min_passes=1)
-def test_simulate_y_from_partially_populated_row(seed):
+def test_simulate_y_from_partially_populated_fresh_row(seed):
  means = ((0,20), (20,0))
  sample_size = 50
  mix_ratio = [0.7, 0.3]