Merge branch 'stable-3.1' into stable-3.2

* stable-3.1:
  Update git submodules
  Update git submodules
  Update git submodules
  Update git submodules
  Elasticsearch: Remove support for EOL 6.6 version
  ElasticContainer: Upgrade V7_8 to elasticsearch 7.8.1
  ElasticContainer: Upgrade V6_8 to elasticsearch 6.8.11
  Fix gr-hovercard-behavior under Firefox
  Add entries to .gitignore of stable-3.0 that exist on master

Change-Id: I4c28a0671f3927b99f01639e80fc7bfbd3059213

.gitignore

@@ -19,6 +19,7 @@
 /.settings/org.eclipse.ltk.core.refactoring.prefs
 /.settings/org.eclipse.m2e.core.prefs
 /.settings/org.maven.ide.eclipse.prefs
+/.ts-out
 /.vscode
 /bazel-*
 /bin/
@@ -46,3 +47,5 @@
 !/plugins/webhooks
 /test_site
 /tools/format
+/tools/node_tools
+/tools/polygerrit-updater

Documentation/config-gerrit.txt

@@ -3256,9 +3256,10 @@ Defaults to 10000.
 When security is enabled in Elasticsearch, the username and password must be provided.
 Note that the same username and password are used for all servers.
 
-For further information about Elasticsearch security, please refer to the documentation:
-
-* link:https://www.elastic.co/guide/en/elastic-stack-overview/6.6/security-getting-started.html[Elasticsearch 6.6,role=external,window=_blank]
+For further information about Elasticsearch security, please refer to
+link:https://www.elastic.co/guide/en/elasticsearch/reference/current/security-getting-started.html[the documentation,role=external,window=_blank].
+This is the current documentation link. Select another Elasticsearch version
+from the dropdown menu available on that page if need be.
 
 [[elasticsearch.username]]elasticsearch.username::
 +

java/com/google/gerrit/elasticsearch/ElasticVersion.java

@@ -18,7 +18,6 @@ import com.google.common.base.Joiner;
 import java.util.regex.Pattern;
 
 public enum ElasticVersion {
-  V6_6("6.6.*"),
   V6_7("6.7.*"),
   V6_8("6.8.*"),
   V7_0("7.0.*"),

javatests/com/google/gerrit/elasticsearch/ElasticContainer.java

@@ -38,12 +38,10 @@ public class ElasticContainer extends ElasticsearchContainer {
 
   private static String getImageName(ElasticVersion version) {
     switch (version) {
-      case V6_6:
-        return "blacktop/elasticsearch:6.6.2";
       case V6_7:
         return "blacktop/elasticsearch:6.7.2";
       case V6_8:
-        return "blacktop/elasticsearch:6.8.10";
+        return "blacktop/elasticsearch:6.8.11";
       case V7_0:
         return "blacktop/elasticsearch:7.0.1";
       case V7_1:
@@ -61,7 +59,7 @@ public class ElasticContainer extends ElasticsearchContainer {
       case V7_7:
         return "blacktop/elasticsearch:7.7.1";
       case V7_8:
-        return "blacktop/elasticsearch:7.8.0";
+        return "blacktop/elasticsearch:7.8.1";
     }
     throw new IllegalStateException("No tests for version: " + version.name());
   }

javatests/com/google/gerrit/elasticsearch/ElasticVersionTest.java

@@ -22,9 +22,6 @@ import org.junit.Test;
 public class ElasticVersionTest {
   @Test
   public void supportedVersion() throws Exception {
-    assertThat(ElasticVersion.forVersion("6.6.0")).isEqualTo(ElasticVersion.V6_6);
-    assertThat(ElasticVersion.forVersion("6.6.1")).isEqualTo(ElasticVersion.V6_6);
-
     assertThat(ElasticVersion.forVersion("6.7.0")).isEqualTo(ElasticVersion.V6_7);
     assertThat(ElasticVersion.forVersion("6.7.1")).isEqualTo(ElasticVersion.V6_7);
 
@@ -73,7 +70,6 @@ public class ElasticVersionTest {
 
   @Test
   public void atLeastMinorVersion() throws Exception {
-    assertThat(ElasticVersion.V6_6.isAtLeastMinorVersion(ElasticVersion.V6_7)).isFalse();
     assertThat(ElasticVersion.V6_7.isAtLeastMinorVersion(ElasticVersion.V6_7)).isTrue();
     assertThat(ElasticVersion.V6_8.isAtLeastMinorVersion(ElasticVersion.V6_8)).isTrue();
     assertThat(ElasticVersion.V7_0.isAtLeastMinorVersion(ElasticVersion.V6_7)).isFalse();
@@ -89,7 +85,6 @@ public class ElasticVersionTest {
 
   @Test
   public void version6OrLater() throws Exception {
-    assertThat(ElasticVersion.V6_6.isV6OrLater()).isTrue();
     assertThat(ElasticVersion.V6_7.isV6OrLater()).isTrue();
     assertThat(ElasticVersion.V6_8.isV6OrLater()).isTrue();
     assertThat(ElasticVersion.V7_0.isV6OrLater()).isTrue();
@@ -105,7 +100,6 @@ public class ElasticVersionTest {
 
   @Test
   public void version7OrLater() throws Exception {
-    assertThat(ElasticVersion.V6_6.isV7OrLater()).isFalse();
     assertThat(ElasticVersion.V6_7.isV7OrLater()).isFalse();
     assertThat(ElasticVersion.V6_8.isV7OrLater()).isFalse();
     assertThat(ElasticVersion.V7_0.isV7OrLater()).isTrue();

tools/nongoogle.bzl

@@ -96,8 +96,8 @@ def declare_nongoogle_deps():
     # and httpasyncclient as necessary.
     maven_jar(
         name = "elasticsearch-rest-client",
-        artifact = "org.elasticsearch.client:elasticsearch-rest-client:7.8.0",
-        sha1 = "ab28f6110bdc7d2ec886e1d6ff29a6c8ee30b883",
+        artifact = "org.elasticsearch.client:elasticsearch-rest-client:7.8.1",
+        sha1 = "59feefe006a96a39f83b0dfb6780847e06c1d0a8",
     )
 
     maven_jar(