Bump BWC version to 6.1.0 for #27469

Author: s1monw

core/src/main/java/org/elasticsearch/common/lucene/search/Queries.java

@@ -70,7 +70,7 @@ public static Query newNestedFilter() {
      * @param indexVersionCreated the index version created since newer indices can identify a parent field more efficiently
      */
     public static Query newNonNestedFilter(Version indexVersionCreated) {
-        if (indexVersionCreated.onOrAfter(Version.V_7_0_0_alpha1)) {
+        if (indexVersionCreated.onOrAfter(Version.V_6_1_0)) {
             return new DocValuesFieldExistsQuery(SeqNoFieldMapper.PRIMARY_TERM_NAME);
         } else {
             return new BooleanQuery.Builder()

core/src/main/java/org/elasticsearch/index/mapper/SeqNoFieldMapper.java

@@ -255,7 +255,7 @@ public void postParse(ParseContext context) throws IOException {
         assert seqID != null;
         int numDocs = context.docs().size();
         final Version versionCreated = context.mapperService().getIndexSettings().getIndexVersionCreated();
-        final boolean includePrimaryTerm = versionCreated.before(Version.V_7_0_0_alpha1);
+        final boolean includePrimaryTerm = versionCreated.before(Version.V_6_1_0);
         for (int i = 1; i < numDocs; i++) {
             final Document doc = context.docs().get(i);
             doc.add(seqID.seqNo);

core/src/test/java/org/apache/lucene/search/QueriesTests.java

@@ -32,7 +32,7 @@ public void testNonNestedQuery() {
             // This is a custom query that extends AutomatonQuery and want to make sure the equals method works
             assertEquals(Queries.newNonNestedFilter(version), Queries.newNonNestedFilter(version));
             assertEquals(Queries.newNonNestedFilter(version).hashCode(), Queries.newNonNestedFilter(version).hashCode());
-            if (version.onOrAfter(Version.V_7_0_0_alpha1)) {
+            if (version.onOrAfter(Version.V_6_1_0)) {
                 assertEquals(Queries.newNonNestedFilter(version), new DocValuesFieldExistsQuery(SeqNoFieldMapper.PRIMARY_TERM_NAME));
             } else {
                 assertEquals(Queries.newNonNestedFilter(version), new BooleanQuery.Builder()