[Test] More robust assertions for watcher execution (#76977)

Since the test is really for making sure the serialised authentication
header can work after cluster upgrade, it is sufficient to just assert
that the watcher execute successfully once regardless of the total
number of execution.

Author: ywangd

x-pack/qa/full-cluster-restart/src/test/java/org/elasticsearch/xpack/restart/FullClusterRestartIT.java

@@ -45,6 +45,7 @@
 import java.util.Locale;
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.stream.Collectors;
 
 import static org.elasticsearch.core.TimeValue.timeValueSeconds;
@@ -53,7 +54,6 @@
 import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.everyItem;
-import static org.hamcrest.Matchers.greaterThan;
 import static org.hamcrest.Matchers.greaterThanOrEqualTo;
 import static org.hamcrest.Matchers.hasEntry;
 import static org.hamcrest.Matchers.hasItems;
@@ -202,11 +202,9 @@ public void testWatcher() throws Exception {
         }
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/63088")
     @SuppressWarnings("unchecked")
     public void testWatcherWithApiKey() throws Exception {
         final Request getWatchStatusRequest = new Request("GET", "/_watcher/watch/watch_with_api_key");
-        getWatchStatusRequest.addParameter("filter_path", "status");
 
         if (isRunningAgainstOldCluster()) {
             final Request createApiKeyRequest = new Request("PUT", "/_security/api_key");
@@ -247,11 +245,19 @@ public void testWatcherWithApiKey() throws Exception {
                 final Map<String, Object> status = (Map<String, Object>) getWatchStatusResponse.get("status");
                 final int version = (int) status.get("version");
 
+                final AtomicBoolean versionIncreased = new AtomicBoolean();
+                final AtomicBoolean executed = new AtomicBoolean();
                 assertBusy(() -> {
                     final Map<String, Object> newGetWatchStatusResponse = entityAsMap(client().performRequest(getWatchStatusRequest));
                     final Map<String, Object> newStatus = (Map<String, Object>) newGetWatchStatusResponse.get("status");
-                    assertThat((int) newStatus.get("version"), greaterThan(version + 2));
-                    assertEquals("executed", newStatus.get("execution_state"));
+                    if (false == versionIncreased.get() && version < (int) newStatus.get("version")) {
+                        versionIncreased.set(true);
+                    }
+                    if (false == executed.get() && "executed".equals(newStatus.get("execution_state"))) {
+                        executed.set(true);
+                    }
+                    assertThat("version increased: [" + versionIncreased.get() + "], executed: [" + executed.get() + "]",
+                        versionIncreased.get() && executed.get(), is(true));
                 });
             } finally {
                 stopWatcher();