replace getClass by the exact class,

to avoid problems if class is extended (findbugs warning)

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@611490 13f79535-47bb-0310-9956-ffa450edef68

src/test/org/apache/commons/math/stat/CertifiedDataTest.java

@@ -137,7 +137,7 @@ public class CertifiedDataTest extends TestCase  {
         BufferedReader in =
             new BufferedReader(
                     new InputStreamReader(
-                            getClass().getResourceAsStream(resource)));
+                            CertifiedDataTest.class.getResourceAsStream(resource)));
         
         String line = null;