Downstream test: disable AssetGraph since it needs Node.js > 6.
Downstream test: disable AssetGraph since it needs Node.js > 6.

Closes gh-1845

jquery/esprima,ChromeDevTools/esprima,jquery/esprima,ariya/esprima,ariya/esprima,jquery/esprima,ChromeDevTools/esprima,ariya/esprima,ChromeDevTools/esprima