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.

Author: dakrone

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

@@ -239,7 +239,7 @@ public boolean ignoreAliases() {
     }
 
     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 void writeIndicesOptions(StreamOutput out) throws IOException {
     }
 
     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();