Tests: Move static bwc indexes to a shared location

There are a few tests that currently use the statically generated
backcompat indexes. This change moves them to a shared location, so they
no longer have to build a path based on the package name of the old
index tests.

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

@@ -98,7 +98,7 @@ public class OldIndexBackwardsCompatibilityIT extends ESIntegTestCase {
 
     private List<String> loadIndexesList(String prefix) throws IOException {
         List<String> indexes = new ArrayList<>();
-        Path dir = getDataPath(".");
+        Path dir = getDataPath("/indices/bwc");
         try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, prefix + "-*.zip")) {
             for (Path path : stream) {
                 indexes.add(path.getFileName().toString());

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

@@ -129,7 +129,7 @@ public class RestoreBackwardsCompatIT extends AbstractSnapshotIntegTestCase {
     }
 
     private Path reposRoot() {
-        return getDataPath(".");
+        return getDataPath("/indices/bwc");
     }
 
     private List<String> repoVersions() throws Exception {
@@ -155,7 +155,7 @@ public class RestoreBackwardsCompatIT extends AbstractSnapshotIntegTestCase {
     }
 
     private void createRepo(String prefix, String version, String repo) throws Exception {
-        String repoFile = prefix + "-" + version + ".zip";
+        String repoFile = "/indices/bwc/" + prefix + "-" + version + ".zip";
         URI repoFileUri = getDataPath(repoFile).toUri();
         URI repoJarUri = new URI("jar:" + repoFileUri.toString() + "!/repo/");
         logger.info("-->  creating repository [{}] for version [{}]", repo, version);

core/src/test/java/org/elasticsearch/common/util/MultiDataPathUpgraderTests.java

@@ -133,7 +133,7 @@ public class MultiDataPathUpgraderTests extends ESTestCase {
      */
     public void testUpgradeRealIndex() throws IOException, URISyntaxException {
         List<Path> indexes = new ArrayList<>();
-        Path dir = getDataPath("/" + OldIndexBackwardsCompatibilityIT.class.getPackage().getName().replace('.', '/')); // the files are in the same pkg as the OldIndexBackwardsCompatibilityTests test
+        Path dir = getDataPath("/indices/bwc");
         try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, "index-*.zip")) {
             for (Path path : stream) {
                 indexes.add(path);

core/src/test/java/org/elasticsearch/index/engine/InternalEngineTests.java

@@ -1786,7 +1786,7 @@ public class InternalEngineTests extends ESTestCase {
 
     public void testUpgradeOldIndex() throws IOException {
         List<Path> indexes = new ArrayList<>();
-        Path dir = getDataPath("/" + OldIndexBackwardsCompatibilityIT.class.getPackage().getName().replace('.', '/')); // the files are in the same pkg as the OldIndexBackwardsCompatibilityTests test
+        Path dir = getDataPath("/indices/bwc");
         try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, "index-*.zip")) {
             for (Path path : stream) {
                 indexes.add(path);

core/src/test/java/org/elasticsearch/index/translog/TranslogTests.java

@@ -1157,7 +1157,7 @@ public class TranslogTests extends ESTestCase {
 
     public void testUpgradeOldTranslogFiles() throws IOException {
         List<Path> indexes = new ArrayList<>();
-        Path dir = getDataPath("/" + OldIndexBackwardsCompatibilityIT.class.getPackage().getName().replace('.', '/')); // the files are in the same pkg as the OldIndexBackwardsCompatibilityTests test
+        Path dir = getDataPath("/indices/bwc");
         try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, "index-*.zip")) {
             for (Path path : stream) {
                 indexes.add(path);