updating ansible playbook for node4
updating ansible playbook for node4

 - no longer install legacy (node 0.10) packages
 - install nodesource node4 packages

panpan0000/RackHD,patelb10/RackHD,geoff-reid/RackHD,johren/RackHD,changev/RackHD,patelb10/RackHD,panpan0000/RackHD,uppalk1/RackHD,tldavies/RackHD,DavidjohnBlodgett/RackHD,BillyAbildgaard/RackHD,DavidjohnBlodgett/RackHD,stuart-stanley/RackHD,BillyAbildgaard/RackHD,RackHD/RackHD,srinia6/RackHD,geoff-reid/RackHD,johren/RackHD,BillyAbildgaard/RackHD,patelb10/RackHD,hohene/RackHD,RackHD-Mirror/RackHD,RackHD-Mirror/RackHD,stuart-stanley/RackHD,tannoa2/RackHD,RackHD-Mirror/RackHD,RackHD/RackHD,hohene/RackHD,tldavies/RackHD,RackHD-Mirror/RackHD,RackHD/RackHD,srinia6/RackHD,changev/RackHD,srinia6/RackHD,changev/RackHD,panpan0000/RackHD,uppalk1/RackHD,tannoa2/RackHD,srinia6/RackHD,hohene/RackHD,geoff-reid/RackHD,johren/RackHD,geoff-reid/RackHD,tannoa2/RackHD,stuart-stanley/RackHD,tldavies/RackHD,stuart-stanley/RackHD,johren/RackHD,tldavies/RackHD,hohene/RackHD,RackHD/RackHD,patelb10/RackHD,BillyAbildgaard/RackHD,panpan0000/RackHD,DavidjohnBlodgett/RackHD,changev/RackHD,uppalk1/RackHD,uppalk1/RackHD,tannoa2/RackHD,DavidjohnBlodgett/RackHD