Disable changesindex check for gerrit replica

Gerrit replicas don't have a changes index hence this check should be
automatically disabled if the server is a replica.

This was missed in Ibbf77115e801e9fc01ec264b01a656b2a2b29a23.

Change-Id: I651c0b08817e7c732c419a0cd3c28fe1e17b31e5

src/main/java/com/googlesource/gerrit/plugins/healthcheck/HealthCheckConfig.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/healthcheck/HealthCheckConfig.java b/src/main/java/com/googlesource/gerrit/plugins/healthcheck/HealthCheckConfig.java
index 93cf563..d866586 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/healthcheck/HealthCheckConfig.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/healthcheck/HealthCheckConfig.java
@@ -16,11 +16,13 @@
 
 import static com.google.common.base.Preconditions.checkNotNull;
 import static com.googlesource.gerrit.plugins.healthcheck.check.HealthCheckNames.BLOCKEDTHREADS;
+import static com.googlesource.gerrit.plugins.healthcheck.check.HealthCheckNames.CHANGES_INDEX;
 import static com.googlesource.gerrit.plugins.healthcheck.check.HealthCheckNames.QUERYCHANGES;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.MoreObjects;
 import com.google.common.base.Strings;
+import com.google.common.collect.ImmutableSet;
 import com.google.gerrit.entities.Project;
 import com.google.gerrit.server.config.AllProjectsName;
 import com.google.gerrit.server.config.AllUsersName;
@@ -28,7 +30,6 @@
 import com.google.gerrit.server.config.PluginConfigFactory;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
-import java.util.Collections;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 import java.util.stream.Collectors;
@@ -56,7 +57,7 @@
   private final boolean isReplica;
 
   private static final Set<String> HEALTH_CHECK_DISABLED_FOR_REPLICAS =
-      Collections.singleton(QUERYCHANGES);
+      ImmutableSet.of(CHANGES_INDEX, QUERYCHANGES);
 
   @Inject
   public HealthCheckConfig(

src/test/java/com/googlesource/gerrit/plugins/healthcheck/HealthCheckIT.java

diff --git a/src/test/java/com/googlesource/gerrit/plugins/healthcheck/HealthCheckIT.java b/src/test/java/com/googlesource/gerrit/plugins/healthcheck/HealthCheckIT.java
index a0c9885..86ce328 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/healthcheck/HealthCheckIT.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/healthcheck/HealthCheckIT.java
@@ -150,6 +150,15 @@
   }
 
   @Test
+  @GerritConfig(name = "container.replica", value = "true")
+  public void shouldReturnChangesIndexAsDisabledForReplica() throws Exception {
+    RestResponse resp = getHealthCheckStatus();
+    resp.assertOK();
+
+    assertCheckResult(getResponseJson(resp), CHANGES_INDEX, "disabled");
+  }
+
+  @Test
   public void shouldReturnQueryChangesMultipleTimesCheck() throws Exception {
     createChange("refs/for/master");
     getHealthCheckStatus();