Moved _create_body() to manager.
Moved _create_body() to manager.

rackspace/pyrax,ddaeschler/pyrax,0dataloss/pyrax,vikomall/pyrax,EdLeafe/pyrax,rackerlabs/heat-pyrax,roelvv/pyrax,opsdisk/pyrax,pratikmallya/pyrax,sivel/pyrax,mandx/pyrax,naemono/pyrax,briancurtin/pyrax