disable flaky test for Python3.6 and lower

Author: mfeurer

test/test_pipeline/components/feature_preprocessing/test_kernel_pca.py

@@ -1,3 +1,4 @@
+import sys
 import unittest
 
 from sklearn.linear_model import RidgeClassifier
@@ -9,6 +10,7 @@
 
 
 class KernelPCAComponentTest(PreprocessingTestCase):
+    @unittest.skipIf(sys.version_info < (3, 7), 'Random failures for Python < 3.7')
     def test_default_configuration(self):
         transformation, original = _test_preprocessing(KernelPCA,
                                                        dataset='digits',