Merge pull request #284 from superklamer/AddIgnore

Issue #284: add Ignore annotation to etl tests

exercises/etl/src/test/java/EtlTest.java

 import org.junit.Test;
+import org.junit.Ignore;
 
 import java.util.*;
 
         assertEquals(expected, etl.transform(old));
     }
 
+    @Ignore
     @Test
     public void testTransformMoreValues() {
         Map<Integer, List<String>> old = new HashMap<Integer, List<String>>() {
         assertEquals(expected, etl.transform(old));
     }
 
+    @Ignore
     @Test
     public void testMoreKeys() {
         Map<Integer, List<String>> old = new HashMap<Integer, List<String>>() {
         assertEquals(expected, etl.transform(old));
     }
 
+    @Ignore
     @Test
     public void testFullDataset() {
         Map<Integer, List<String>> old = new HashMap<Integer, List<String>>() {