Added a method to return a list of augmented Nicira Instructions

-Example output of a needed flow using an NX action
and an OXM set_field metadata:
actions=resubmit(10,0),write_metadata:0xc/0xc

-This is indeed odd. Returned List<Instruction>
rather then InstructionBuilder since the first
param was variable etc. Made a new method to
avoid breaking SFC or anyone using the current
NX augmentation. Will knock out match next.

This is indeed odd :s
rev131026.instruction.list.Instruction
rev131026.instruction.Instruction

Signed-off-by: Brent Salisbury <brent.salisbury@gmail.com>