Update to elasticsearch 1.2.0

Closes #11.
(cherry picked from commit 8a87054)

README.md

@@ -6,6 +6,7 @@ The Python (jython) language plugin allows to have `python` as the language of s
 In order to install the plugin, simply run: `bin/plugin -install elasticsearch/elasticsearch-lang-python/2.0.0`.
 
 * For master elasticsearch versions, look at [master branch](https://github.com/elasticsearch/elasticsearch-lang-python/tree/master).
+* For 1.2.x elasticsearch versions, look at [es-1.2 branch](https://github.com/elasticsearch/elasticsearch-lang-python/tree/es-1.2).
 * For 1.1.x elasticsearch versions, look at [es-1.1 branch](https://github.com/elasticsearch/elasticsearch-lang-python/tree/es-1.1).
 * For 1.0.x elasticsearch versions, look at [es-1.0 branch](https://github.com/elasticsearch/elasticsearch-lang-python/tree/es-1.0).
 * For 0.90.x elasticsearch versions, look at [es-0.90 branch](https://github.com/elasticsearch/elasticsearch-lang-python/tree/es-0.90).

pom.xml

@@ -32,7 +32,7 @@
 
     <properties>
         <elasticsearch.version>2.0.0-SNAPSHOT</elasticsearch.version>
-        <lucene.version>4.7.0</lucene.version>
+        <lucene.version>4.8.1</lucene.version>
         <tests.jvms>1</tests.jvms>
         <tests.shuffle>true</tests.shuffle>
         <tests.output>onerror</tests.output>
@@ -115,8 +115,8 @@
                 <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/main/java/org/elasticsearch/script/python/PythonScriptEngineService.java

@@ -62,6 +62,11 @@ public class PythonScriptEngineService extends AbstractComponent implements Scri
         return new String[]{"py"};
     }
 
+    @Override
+    public boolean sandboxed() {
+        return false;
+    }
+
     @Override
     public Object compile(String script) {
         return interp.compile(script);

src/test/java/org/elasticsearch/script/python/PythonScriptMultiThreadedTest.java

@@ -20,7 +20,6 @@
 package org.elasticsearch.script.python;
 
 import org.elasticsearch.common.settings.ImmutableSettings;
-import org.elasticsearch.common.util.concurrent.jsr166y.ThreadLocalRandom;
 import org.elasticsearch.script.ExecutableScript;
 import org.elasticsearch.test.ElasticsearchTestCase;
 import org.junit.After;
@@ -30,6 +29,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.CyclicBarrier;
+import java.util.concurrent.ThreadLocalRandom;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 import static org.hamcrest.Matchers.equalTo;