Update to Lucene 4.8.0/ elasticsearch 2.0.0

Latest changes break tests

Closes #21.
(cherry picked from commit 04c77e8)

pom.xml

@@ -51,7 +51,7 @@ governing permissions and limitations under the License. -->
         <elasticsearch.version>2.0.0-SNAPSHOT</elasticsearch.version>
         <google.gce.version>v1-rev15-1.18.0-rc</google.gce.version>
         <google.api.version>1.18.0-rc</google.api.version>
-        <lucene.version>4.7.0</lucene.version>
+        <lucene.version>4.8.0</lucene.version>
         <tests.shuffle>true</tests.shuffle>
         <tests.output>onerror</tests.output>
         <tests.client.ratio></tests.client.ratio>

src/test/java/org/elasticsearch/discovery/gce/AbstractGceComputeServiceTest.java

@@ -32,7 +32,7 @@ import static org.hamcrest.Matchers.is;
 
 @ElasticsearchIntegrationTest.ClusterScope(
         scope = ElasticsearchIntegrationTest.Scope.SUITE,
-        numNodes = 2,
+        numDataNodes = 2,
         transportClientRatio = 0.0)
 public abstract class AbstractGceComputeServiceTest extends ElasticsearchIntegrationTest {
     /**

src/test/java/org/elasticsearch/gce/itest/GceSimpleITest.java

@@ -37,7 +37,7 @@ import org.junit.Test;
 @AbstractGceTest.GceTest
 @ElasticsearchIntegrationTest.ClusterScope(
         scope = ElasticsearchIntegrationTest.Scope.TEST,
-        numNodes = 1,
+        numDataNodes = 1,
         transportClientRatio = 0.0)
 public class GceSimpleITest extends AbstractGceTest {