Another fix for rollup indexer tests (#110724)

I have recently fixed invocation of `maybeTriggerAsyncJob` in this test
but now invocation count does not match since it counts every _attempt_
to start a job even if it was not successful.

Author: lkts

x-pack/plugin/rollup/src/test/java/org/elasticsearch/xpack/rollup/job/RollupIndexerStateTests.java

@@ -41,6 +41,7 @@
 import java.util.function.Function;
 
 import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.greaterThanOrEqualTo;
 import static org.hamcrest.Matchers.startsWith;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.mock;
@@ -562,7 +563,6 @@ public void testMultipleJobTriggering() throws Exception {
                 assertThat(indexer.getState(), equalTo(IndexerState.INDEXING));
                 latch.countDown();
                 assertBusy(() -> assertThat(indexer.getState(), equalTo(IndexerState.STARTED)));
-                assertThat(indexer.getStats().getNumInvocations(), equalTo((long) i + 1));
                 assertThat(indexer.getStats().getNumPages(), equalTo((long) i + 1));
             }
             final CountDownLatch latch = indexer.newLatch();
@@ -572,6 +572,7 @@ public void testMultipleJobTriggering() throws Exception {
             latch.countDown();
             assertBusy(() -> assertThat(indexer.getState(), equalTo(IndexerState.STOPPED)));
             assertTrue(indexer.abort());
+            assertThat(indexer.getStats().getNumInvocations(), greaterThanOrEqualTo(6L));
         } finally {
             ThreadPool.terminate(threadPool, 30, TimeUnit.SECONDS);
         }