bump lucene version for 6_3_0

Author: bleskes

server/src/main/java/org/elasticsearch/Version.java

@@ -169,7 +169,7 @@ public class Version implements Comparable<Version>, ToXContentFragment {
     public static final int V_6_2_5_ID = 6020599;
     public static final Version V_6_2_5 = new Version(V_6_2_5_ID, LUCENE_7_2_1);
     public static final int V_6_3_0_ID = 6030099;
-    public static final Version V_6_3_0 = new Version(V_6_3_0_ID, org.apache.lucene.util.Version.LUCENE_7_3_0);
+    public static final Version V_6_3_0 = new Version(V_6_3_0_ID, org.apache.lucene.util.Version.LUCENE_7_3_1);
     public static final int V_6_4_0_ID = 6040099;
     public static final Version V_6_4_0 = new Version(V_6_4_0_ID, org.apache.lucene.util.Version.LUCENE_7_4_0);
     public static final int V_7_0_0_alpha1_ID = 7000001;