Merge pull request #17530 from jimferenczi/bwc_2.3.1

Replace problematic bwc indices for 2.3.1 with newly generated one.

core/src/test/java/org/elasticsearch/bwcompat/OldIndexBackwardsCompatibilityIT.java

@@ -295,7 +295,6 @@ public class OldIndexBackwardsCompatibilityIT extends ESIntegTestCase {
         }
     }
     
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/17514")
     public void testOldIndexes() throws Exception {
         setupCluster();