[SHARED] Allow executors to create nested containers

 docs.google.com/document/d/1r…

Allow executors to create nested containers GoalsError parsing storage content: '<div class="sharelinks-link-meta-data"><ac:macro ac:name="panel"><ac:rich-text-body><h3><ac:image ac:align="right"><ri:url ri:value='https://lh4.googleusercontent.com/tB1gLRpnF6PCOF9V4IL6siIsaivbKk9Cr9rTscbHdvb7u5TmZ73cMZGY43MXRMU2hI_hbw=w1200-h630-p' /></ac:image></h3><p><ac:image ac:width='16'><ri:url ri:value="https://ssl.gstatic.com/docs/documents/images/kix-favicon6.ico" /></ac:image>&nbsp;<a href="https://docs.google.com/document/d/1rwDumptgM4jCQQCXWgjeARRHNHkKYRuHJVhwYEFXQRU/edit">docs.google.com/document/d/1r…</a></p><blockquote><p>Allow executors to create nested containers Goals In short, to allow executors to create and manage nested containers. These nested containers should be isolated and monitored in the same manner as executor containers are currently managed. The Mesos agent should track the lifecycle of nested...</p></blockquote><p><strong><a href="https://docs.google.com/document/d/1rwDumptgM4jCQQCXWgjeARRHNHkKYRuHJVhwYEFXQRU/edit">Open link</a></strong></p></ac:rich-text-body></ac:macro></div>'