Added a Node StoreLister type

[bigkraig]

I'm building an ALB ingress controller that will leverage NodePorts, this was needed to be able to access the EC2 IDs of the nodes.

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[k8s-reviewable]

This change is 

[aledbf]

@bigkraig please sign the cla

[bigkraig]

I have just finished signing it

[aledbf]

/lgtm

[aledbf]

@bigkraig waiting for ci to merge

[coveralls]

Coverage decreased (-0.05%) to 45.626% when pulling 0d05db2 on Ticketmaster:nodelister into b5819d8 on kubernetes:master.

[aledbf]

@bigkraig thanks!

[bprashanth]

@bigkraig nice! I assume you're talking to @justinsb as well since often he has something AWS related in the pipeline for most features