title: TomcatEmbeddedServletContainerFactory is missing in Spring Boot 2
body: <p>I have Spring Boot application version 1.5.x, which uses <code>org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory</code>, I'm trying to migrate it to Spring Boot 2, but the app does not compile, although a have a dependency to <code>org.springframework.boot:spring-boot-starter-tomcat</code>. The compiler issues the error below:</p>
  
  <pre><code>error: package org.springframework.boot.context.embedded.tomcat
  </code></pre>