Relax expected number of evaluations (unit test).

Optimization is sensitive to the change from "AccurateMath" to "Math"
for computing the "pow" function used in "TestFunction.SUM_POW".

commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/BOBYQAOptimizerTest.java

@@ -185,7 +185,7 @@ public class BOBYQAOptimizerTest {
             new PointValuePair(OptimTestUtils.point(dim, 0.0), 0.0);
         doTest(TestFunction.SUM_POW.withDimension(dim), startPoint, boundaries,
                 GoalType.MINIMIZE,
-                1e-8, 1e-1, 21000, expected);
+                1e-8, 1e-1, 21720, expected);
     }
 
     @Test