Raise test timeouts in ShutdownIT

Author: adutra

integration-tests/src/test/java/com/datastax/oss/driver/core/session/ShutdownIT.java

@@ -120,7 +120,7 @@ public void should_fail_requests_when_session_is_closed() throws Exception {
     }
     TimeUnit.MILLISECONDS.sleep(100);
     session.forceCloseAsync();
-    assertThat(gotSessionClosedError.await(1, TimeUnit.SECONDS))
+    assertThat(gotSessionClosedError.await(10, TimeUnit.SECONDS))
         .as("Expected to get the 'Session is closed' error shortly after shutting down")
         .isTrue();
     requestExecutor.shutdownNow();