Java 5 to Java 8 updates.

Author: dghgit

core/src/test/java/org/bouncycastle/pqc/crypto/test/MLDSATest.java

@@ -655,7 +655,7 @@ private static List<TestVector> parseTestVectors(InputStream src)
         {
             // Skip comments and empty lines
             line = line.split("//")[0].trim();
-            if (line.isEmpty())
+            if (line.length() == 0)
             {
                 continue;
             }