changes to editing-code
changes to editing-code

removed reference to trello and referred to launchpad

Change-Id: Ia96e4ad824d537b4b5f6446404d6c33e248bdbf5

openstack/training-guides,Nabs007/training-guides,harrisonfeng/training-guides,Nabs007/training-guides,Nabs007/training-guides,openstack/training-guides,harrisonfeng/training-guides,harrisonfeng/training-guides