Fix test race issue

Author: vietj

vertx-pg-client/src/test/java/io/vertx/pgclient/SharedPoolTest.java

@@ -69,20 +69,24 @@ public void start() {
   public void testCloseAutomatically(TestContext ctx) {
     int maxSize = 8;
     int instances = maxSize * 4;
-    Async latch = ctx.async(instances);
+    Async latch = ctx.async(1 + instances);
     AtomicReference<String> deployment = new AtomicReference<>();
     Async async = ctx.async();
     vertx.deployVerticle(() -> new AbstractVerticle() {
-      PgPool pool;
-      @Override
-      public void start() {
-        pool = PgPool.pool(vertx, options, new PoolOptions().setMaxSize(maxSize).setShared(true));
-        pool
-          .query("SELECT 1")
-          .execute()
-          .onComplete(ctx.asyncAssertSuccess(res -> latch.countDown()));
-      }
-    }, new DeploymentOptions().setInstances(instances)).onComplete(ctx.asyncAssertSuccess(deployment::set));
+        PgPool pool;
+        @Override
+        public void start() {
+          pool = PgPool.pool(vertx, options, new PoolOptions().setMaxSize(maxSize).setShared(true));
+          pool
+            .query("SELECT 1")
+            .execute()
+            .onComplete(ctx.asyncAssertSuccess(res -> latch.countDown()));
+        }
+      }, new DeploymentOptions().setInstances(instances))
+      .onComplete(ctx.asyncAssertSuccess(id -> {
+        deployment.set(id);
+        latch.countDown();
+      }));
     latch.awaitSuccess(20_000);
     vertx.undeploy(deployment.get())
       .compose(v -> PgConnection.connect(vertx, options))