Add name to each test case.

prime-factors/src/test/java/PrimeFactorsTest.java

     private double input;
     private List<Integer> expectedOutput;
 
-    @Parameters
+    @Parameters(name="Prime factors of {0} = {1}")
     public static Collection<Object[]> data() {
         return Arrays.asList(new Object[][]{
                 {1, Arrays.asList(new Integer[0])},