Revert threshold changes

Author: au650680

tests/integration/methods/test_sys_id.py

@@ -40,9 +40,8 @@ def test_sysid():
     stored_mode_shapes = stored_data['mode_shapes']
 
     tolerance = 0.4
-    cov_tolerance = 100
     assert np.allclose(frequencies, stored_frequencies, atol=tolerance, equal_nan=True), "Frequencies do not match!"
-    assert np.allclose(cov_freq, stored_cov_freq, atol=cov_tolerance, equal_nan=True), "Covariance frequencies do not match!"
+    assert np.allclose(cov_freq, stored_cov_freq, atol=tolerance, equal_nan=True), "Covariance frequencies do not match!"
     assert np.allclose(damping_ratios, stored_damping_ratios, atol=tolerance, equal_nan=True), "Damping ratios do not match!"
     assert np.allclose(cov_damping, stored_cov_damping, atol=tolerance*2, equal_nan=True), "Covariance damping ratios do not match!"
     assert np.allclose(mode_shapes, stored_mode_shapes, atol=tolerance, equal_nan=True), "Mode shapes do not match!"