cli integration: sync container & image deletion

This makes container and image removal in the tests run synchronously.

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)

integration-cli/docker_cli_save_load_test.go

@@ -42,8 +42,8 @@ func TestSaveAndLoadRepo(t *testing.T) {
 	out, _, err = runCommandWithOutput(inspectCmd)
 	errorOut(err, t, fmt.Sprintf("the repo should exist after loading it: %v %v", out, err))
 
-	go deleteImages(repoName)
-	go deleteContainer(cleanedContainerID)
+	deleteContainer(cleanedContainerID)
+	deleteImages(repoName)
 
 	os.Remove("/tmp/foobar-save-load-test.tar")