Update to elasticsearch 1.2.0

elasticsearch 1.2.0 has been released. We need to update from SNAPSHOT to released version.

Closes #26.

(cherry picked from commit ae3f3c23e3fde3b2327c1b5d759ff27675ecb40c)

pom.xml

@@ -33,7 +33,7 @@
 
     <properties>
         <elasticsearch.version>2.0.0-SNAPSHOT</elasticsearch.version>
-        <lucene.version>4.8.0</lucene.version>
+        <lucene.version>4.8.1</lucene.version>
         <tests.jvms>1</tests.jvms>
         <tests.shuffle>true</tests.shuffle>
         <tests.output>onerror</tests.output>
@@ -105,8 +105,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>2.3.2</version>
                 <configuration>
-                    <source>1.6</source>
-                    <target>1.6</target>
+                    <source>1.7</source>
+                    <target>1.7</target>
                 </configuration>
             </plugin>
             <plugin>

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(scope = ElasticsearchIntegrationTest.Scope.SUITE)
+@ElasticsearchIntegrationTest.ClusterScope(numDataNodes = 1, scope = ElasticsearchIntegrationTest.Scope.SUITE)
 public class SimplePolishIntegrationTests extends ElasticsearchIntegrationTest {
 
     @Test