Update to elasticsearch 0.90.4

Breaking changes in to EsExecutors was introduced in elasticsearch 0.90.4
Closes #35.

Author: nkvoll

README.md

@@ -15,7 +15,7 @@ In order to install the plugin, simply run: `bin/plugin -install elasticsearch/e
 	<tbody>
 		<tr>
 			<td>1.15.0-SNAPSHOT (master)</td>
-			<td>0.90.3 -> master</td>
+			<td>0.90.4 -> master</td>
 		</tr>
 		<tr>
 			<td>1.14.0</td>

pom.xml

@@ -31,7 +31,7 @@
     </parent>
 
     <properties>
-        <elasticsearch.version>0.90.3</elasticsearch.version>
+        <elasticsearch.version>0.90.4</elasticsearch.version>
     </properties>
 
     <repositories>

src/main/java/org/elasticsearch/gateway/s3/S3Gateway.java

@@ -90,7 +90,7 @@ public S3Gateway(Settings settings, ThreadPool threadPool, ClusterService cluste
         ByteSizeValue chunkSize = componentSettings.getAsBytesSize("chunk_size", new ByteSizeValue(100, ByteSizeUnit.MB));
 
         int concurrentStreams = componentSettings.getAsInt("concurrent_streams", 5);
-        this.concurrentStreamPool = EsExecutors.newScalingExecutorService(1, concurrentStreams, 5, TimeUnit.SECONDS, EsExecutors.daemonThreadFactory(settings, "[s3_stream]"));
+        this.concurrentStreamPool = EsExecutors.newScaling(1, concurrentStreams, 5, TimeUnit.SECONDS, EsExecutors.daemonThreadFactory(settings, "[s3_stream]"));
 
         logger.debug("using bucket [{}], region [{}], chunk_size [{}], concurrent_streams [{}]", bucket, region, chunkSize, concurrentStreams);