Merge pull request #402 from vasouv/sieve-redundant-array

Sieve redundant array

exercises/sieve/src/test/java/SieveTest.java

 import org.junit.Ignore;
 
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 
 import static org.junit.Assert.assertEquals;
     @Test
     public void findFirstPrime() {
         Sieve sieve = new Sieve(2);
-        List<Integer> expectedOutput = Arrays.asList(new Integer[]{2});
+        List<Integer> expectedOutput = Collections.singletonList(2);
 
         assertEquals(expectedOutput, sieve.getPrimes());
     }