Dependencies: Update to Elasticsearch 6.4.0

implies gradle wrapper upgrade to 4.9 and removing unused import due to
new checkstyle rule

Author: spinscale

README.md

@@ -10,6 +10,7 @@ This plugin is also intended to show you, that using gradle as a build system ma
 
 | ES    | Command |
 | ----- | ------- |
+| 6.4.0 | `bin/elasticsearch-plugin install https://github.com/spinscale/elasticsearch-ingest-opennlp/releases/download/6.4.0.1/ingest-opennlp-6.4.0.1.zip` |
 | 6.3.2 | `bin/elasticsearch-plugin install https://github.com/spinscale/elasticsearch-ingest-opennlp/releases/download/6.3.2.1/ingest-opennlp-6.3.2.1.zip` |
 | 6.3.1 | `bin/elasticsearch-plugin install https://github.com/spinscale/elasticsearch-ingest-opennlp/releases/download/6.3.1.1/ingest-opennlp-6.3.1.1.zip` |
 | 6.3.0 | `bin/elasticsearch-plugin install https://github.com/spinscale/elasticsearch-ingest-opennlp/releases/download/6.3.0.1/ingest-opennlp-6.3.0.1.zip` |

build.gradle

@@ -8,7 +8,7 @@ buildscript {
  }
 
   dependencies {
-    classpath "org.elasticsearch.gradle:build-tools:6.3.2"
+    classpath "org.elasticsearch.gradle:build-tools:6.4.0"
   }
 }
 
@@ -20,10 +20,11 @@ plugins {
 import de.undercouch.gradle.tasks.download.Download
 
 group = 'de.spinscale.elasticsearch.plugin.ingest'
-version = '6.3.2.1-SNAPSHOT'
+version = '6.4.0.1-SNAPSHOT'
 
 apply plugin: 'java'
 apply plugin: 'idea'
+apply plugin: 'eclipse'
 apply plugin: 'elasticsearch.esplugin'
 
 // license of this project

gradle/wrapper/gradle-wrapper.jar

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.7-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.9-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradle/wrapper/gradle-wrapper.properties

@@ -19,7 +19,6 @@
 
 import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Setting.Property;
-import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.ingest.Processor;
 import org.elasticsearch.plugins.IngestPlugin;
 import org.elasticsearch.plugins.Plugin;
@@ -30,8 +29,6 @@
 import java.util.List;
 import java.util.Map;
 
-import static org.elasticsearch.common.settings.Setting.groupSetting;
-
 public class IngestOpenNlpPlugin extends Plugin implements IngestPlugin {
 
     public static final Setting.AffixSetting<String> MODEL_FILE_SETTINGS =
@@ -50,4 +47,4 @@ public Map<String, Processor.Factory> getProcessors(Processor.Parameters paramet
 
         return Collections.singletonMap(OpenNlpProcessor.TYPE, new OpenNlpProcessor.Factory(openNlpService));
     }
-}
+}