increased fraction within tolerance for decision tree regressor test suite

Author: imatiach-msft

mllib/src/test/scala/org/apache/spark/ml/regression/DecisionTreeRegressorSuite.scala

@@ -177,10 +177,10 @@ class DecisionTreeRegressorSuite extends MLTest with DefaultReadWriteTest {
         .setSeed(123)
       MLTestingUtils.testArbitrarilyScaledWeights[DecisionTreeRegressionModel,
         DecisionTreeRegressor](df.as[LabeledPoint], estimator,
-        MLTestingUtils.modelPredictionEquals(df, _ ~= _ relTol 0.05, 0.9))
+        MLTestingUtils.modelPredictionEquals(df, _ ~= _ relTol 0.1, 0.99))
       MLTestingUtils.testOutliersWithSmallWeights[DecisionTreeRegressionModel,
         DecisionTreeRegressor](df.as[LabeledPoint], estimator, numClasses,
-        MLTestingUtils.modelPredictionEquals(df, _ ~= _ relTol 0.1, 0.8),
+        MLTestingUtils.modelPredictionEquals(df, _ ~= _ relTol 0.1, 0.99),
         outlierRatio = 2)
       MLTestingUtils.testOversamplingVsWeighting[DecisionTreeRegressionModel,
         DecisionTreeRegressor](df.as[LabeledPoint], estimator,