code: function createRunQueue(modules) {
  
  	return modules
  		.map((mod) => mod._runQueue)
  		.reduce((acc, res) => acc.concat(res), []);
  
  }
docs: Runs recursively through modules and their dependency-modules
  and creates an array with handlers to invoke later by app-instance after startup.
  @param  {Object} module Module instance
  @return {Array}        Array of run handlers.