Nik Everett 856936c286
REST Client: NodeSelector for node attributes (#31296)
Add a `NodeSelector` so that users can filter the nodes that receive
requests based on node attributes.

I believe we'll need this to backport #30523 and we want it anyway.

I also added a bash script to help with rebuilding the sniffer parsing
test documents.
2018-06-15 08:04:54 -04:00
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