去除springboot内置tomcat

/**
 * @author zx
 * @title: ServletInitializer
 * @projectName activiti
 * @description: 解决内置tomcat
 * @date 2019/2/2817:21
 */
public class ServletInitializer extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(WebApplication.class);
    }
}