Fix flaky TenantControllerTest by draining housekeeper before teardown

Tests like testFindTenantsByTitle create 261 tenants and delete them via
deleteEntitiesAsync, which only waits for HTTP responses — not housekeeper
completion. Each tenant deletion submits ~30 TenantEntitiesDeletionHousekeeper
tasks (~7800 tasks total), which cascade further. The teardown's deleteTenant
then waits for lag==0 with a 90s timeout, which is insufficient for this
backlog and causes ConditionTimeoutException.

Fix: add awaitHousekeeperDrained() (5-min timeout) called at the start of
teardownWebTest so any pending housekeeper work from the test body drains
before per-tenant teardown deletions begin.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

application/src/test/java/org/thingsboard/server/controller/AbstractWebTest.java

@@ -405,6 +405,10 @@ public abstract class AbstractWebTest extends AbstractInMemoryStorageTest {
     public void teardownWebTest() throws Exception {
         log.debug("Executing web test teardown");
 
+        // Drain any pending housekeeper work left by the test body (e.g., bulk tenant deletes)
+        // before proceeding with teardown deletions, to avoid 90s per-tenant wait timing out.
+        awaitHousekeeperDrained();
+
         loginSysAdmin();
         deleteTenant(tenantId);
         deleteDifferentTenant();
@@ -436,6 +440,11 @@ public abstract class AbstractWebTest extends AbstractInMemoryStorageTest {
                 .until(() -> storage.getLag("tb_housekeeper") == 0);
     }
 
+    protected void awaitHousekeeperDrained() {
+        Awaitility.await("housekeeper drained").atMost(5, TimeUnit.MINUTES).during(300, TimeUnit.MILLISECONDS)
+                .until(() -> storage.getLag("tb_housekeeper") == 0);
+    }
+
     private List<Tenant> getAllTenants() throws Exception {
         List<Tenant> loadedTenants = new ArrayList<>();
         PageLink pageLink = new PageLink(10);

application/src/test/resources/application-test.properties

@@ -44,6 +44,7 @@ queue.transport_api.response_poll_interval=5
 queue.transport.poll_interval=5
 queue.core.poll-interval=5
 queue.core.partitions=2
+queue.core.housekeeper.task-reprocessing-delay-ms=0
 queue.rule-engine.poll-interval=5
 
 queue.rule-engine.stats.enabled=true