TestRunRedirectStdout kept failing with timed out.

Docker-DCO-1.1-Signed-off-by: Jessica Frazelle <jess@docker.com> (github: jfrazelle)

integration-cli/docker_cli_run_test.go

@@ -2266,7 +2266,7 @@ func TestRunRedirectStdout(t *testing.T) {
 		}()
 
 		select {
-		case <-time.After(time.Second):
+		case <-time.After(2 * time.Second):
 			t.Fatal("command timeout")
 		case <-ch:
 		}