Update to Lucene 4.8

Closes #23.
(cherry picked from commit 64a1d9c)

Author: dadoonet

pom.xml

@@ -33,7 +33,7 @@
 
     <properties>
         <elasticsearch.version>2.0.0-SNAPSHOT</elasticsearch.version>
-        <lucene.version>4.7.0</lucene.version>
+        <lucene.version>4.8.0</lucene.version>
         <tests.jvms>1</tests.jvms>
         <tests.shuffle>true</tests.shuffle>
         <tests.output>onerror</tests.output>

src/test/java/org/elasticsearch/index/analysis/SimplePolishIntegrationTests.java

@@ -31,7 +31,7 @@
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.CoreMatchers.notNullValue;
 
-@ElasticsearchIntegrationTest.ClusterScope(numNodes = 1, scope = ElasticsearchIntegrationTest.Scope.SUITE)
+@ElasticsearchIntegrationTest.ClusterScope(scope = ElasticsearchIntegrationTest.Scope.SUITE)
 public class SimplePolishIntegrationTests extends ElasticsearchIntegrationTest {
 
     @Test