Per recent updates, updating use of 'compute' node to be
'worker' node. StarlingX uses worker nodes, and a 'compute' node
is a specialization of a worker node (OpenStack compute label applied).
- Update narrative text to use worker node
- Update shell scripts to use NODE instead of COMPUTE
Updated non-versioned content and R3 installation guides.
Change-Id: Ia3c5d354468f18efb79c823e5bfddf17e34998a9
Signed-off-by: Kristal Dale <kristal.dale@intel.com>