extend is-write-index serialization support to 6.4 (#31415)

Author: talevy

server/src/main/java/org/elasticsearch/action/admin/indices/alias/Alias.java

@@ -202,7 +202,7 @@ public void readFrom(StreamInput in) throws IOException {
         filter = in.readOptionalString();
         indexRouting = in.readOptionalString();
         searchRouting = in.readOptionalString();
-        if (in.getVersion().onOrAfter(Version.V_7_0_0_alpha1)) {
+        if (in.getVersion().onOrAfter(Version.V_6_4_0)) {
             writeIndex = in.readOptionalBoolean();
         } else {
             writeIndex = null;
@@ -215,7 +215,7 @@ public void writeTo(StreamOutput out) throws IOException {
         out.writeOptionalString(filter);
         out.writeOptionalString(indexRouting);
         out.writeOptionalString(searchRouting);
-        if (out.getVersion().onOrAfter(Version.V_7_0_0_alpha1)) {
+        if (out.getVersion().onOrAfter(Version.V_6_4_0)) {
             out.writeOptionalBoolean(writeIndex);
         }
     }

server/src/main/java/org/elasticsearch/action/admin/indices/alias/IndicesAliasesRequest.java

@@ -235,7 +235,7 @@ public AliasActions(StreamInput in) throws IOException {
             routing = in.readOptionalString();
             searchRouting = in.readOptionalString();
             indexRouting = in.readOptionalString();
-            if (in.getVersion().onOrAfter(Version.V_7_0_0_alpha1)) {
+            if (in.getVersion().onOrAfter(Version.V_6_4_0)) {
                 writeIndex = in.readOptionalBoolean();
             }
         }
@@ -249,7 +249,7 @@ public void writeTo(StreamOutput out) throws IOException {
             out.writeOptionalString(routing);
             out.writeOptionalString(searchRouting);
             out.writeOptionalString(indexRouting);
-            if (out.getVersion().onOrAfter(Version.V_7_0_0_alpha1)) {
+            if (out.getVersion().onOrAfter(Version.V_6_4_0)) {
                 out.writeOptionalBoolean(writeIndex);
             }
         }

server/src/main/java/org/elasticsearch/cluster/metadata/AliasMetaData.java

@@ -186,7 +186,7 @@ public void writeTo(StreamOutput out) throws IOException {
             out.writeBoolean(false);
         }
 
-        if (out.getVersion().onOrAfter(Version.V_7_0_0_alpha1)) {
+        if (out.getVersion().onOrAfter(Version.V_6_4_0)) {
             out.writeOptionalBoolean(writeIndex());
         }
     }
@@ -210,7 +210,7 @@ public AliasMetaData(StreamInput in) throws IOException {
             searchRouting = null;
             searchRoutingValues = emptySet();
         }
-        if (in.getVersion().onOrAfter(Version.V_7_0_0_alpha1)) {
+        if (in.getVersion().onOrAfter(Version.V_6_4_0)) {
             writeIndex = in.readOptionalBoolean();
         } else {
             writeIndex = null;