test: assert on >= 5 rather than strictly ==

due to process scheduling, we may even receive job_completed
messages before the test continues. The assert only needs to
check that there are enough messages to prevent invalid indexing.
This fixes a flakey test.

test/laminar-functional.cpp

@@ -178,7 +178,7 @@ TEST_F(LaminarFixture, QueueFront) {
     ioContext->waitScope.poll();
     setNumExecutors(2);
     ioContext->waitScope.poll();
-    ASSERT_EQ(5, es->messages().size());
+    ASSERT_GE(es->messages().size(), 5);
     auto started1 = es->messages().at(3).GetObject();
     EXPECT_STREQ("job_started", started1["type"].GetString());
     EXPECT_STREQ("bar", started1["data"]["name"].GetString());