Adjust serialization version in IndicesOptions

The PR for the new format of serialization was backported, so this needs to be
adjusted since it can now speak to 6.4 nodes in the new way.

server/src/main/java/org/elasticsearch/action/support/IndicesOptions.java

@@ -239,7 +239,7 @@ public class IndicesOptions {
     }
 
     public void writeIndicesOptions(StreamOutput out) throws IOException {
-        if (out.getVersion().onOrAfter(Version.V_7_0_0_alpha1)) {
+        if (out.getVersion().onOrAfter(Version.V_6_4_0)) {
             out.writeEnumSet(options);
             out.writeEnumSet(expandWildcards);
         } else {
@@ -248,7 +248,7 @@ public class IndicesOptions {
     }
 
     public static IndicesOptions readIndicesOptions(StreamInput in) throws IOException {
-        if (in.getVersion().onOrAfter(Version.V_7_0_0_alpha1)) {
+        if (in.getVersion().onOrAfter(Version.V_6_4_0)) {
             return new IndicesOptions(in.readEnumSet(Option.class), in.readEnumSet(WildcardStates.class));
         } else {
             byte id = in.readByte();