hamming: add hint to @Ignore annotations

exercises/hamming/src/test/java/HammingTest.java

@@ -16,51 +16,51 @@ public class HammingTest {
         assertThat(new Hamming("A", "A").getHammingDistance(), is(0));
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testHammingDistanceForSingleNucleotideStrand() {
         assertThat(new Hamming("A", "G").getHammingDistance(), is(1));
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testHammingDistanceForSmallStrand() {
         assertThat(new Hamming("AG", "CT").getHammingDistance(), is(2));
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testSmallHammingDistance() {
         assertThat(new Hamming("AT", "CT").getHammingDistance(), is(1));
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testSmallHammingDistanceInLongerStrand() {
         assertThat(new Hamming("GGACG", "GGTCG").getHammingDistance(), is(1));
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testValidatesFirstStrandNotLonger() {
         thrown.expect(IllegalArgumentException.class);
         new Hamming("AAAG", "AAA");
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testValidatesOtherStrandNotLonger() {
         thrown.expect(IllegalArgumentException.class);
         new Hamming("AAA", "AAAG");
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testLargeHammingDistance() {
         assertThat(new Hamming("GATACA", "GCATAA").getHammingDistance(), is(4));
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testHammingDistanceInVeryLongStrand() {
         assertThat(new Hamming("GGACGGATTCTG", "AGGACGGATTCT").getHammingDistance(), is(9));