Disable debug output in org.apache.commons.lang3.math.NumberUtilsTest

Add a debug toggle for this test

Author: garydgregory

src/test/java/org/apache/commons/lang3/math/NumberUtilsTest.java

@@ -36,6 +36,7 @@
 import java.util.function.Function;
 
 import org.apache.commons.lang3.AbstractLangTest;
+import org.apache.commons.lang3.SystemProperties;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ValueSource;
@@ -108,7 +109,7 @@ private boolean isApplyNonNull(final String s, final Function<String, ?> functio
             assertNotNull(function.apply(s));
             return true;
         } catch (final Exception e) {
-            if (!s.matches(".*\\s.*")) {
+            if (!s.matches(".*\\s.*") && SystemProperties.getBoolean(getClass(), "printStackTrace", () -> false)) {
                 e.printStackTrace();
             }
             return false;