Fixes with JupyterHub 2.3.1#45

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kmpaul wants to merge 5 commits intoNERSC:masterfrom

Commits on Jun 13, 2022

Simplify since ip and port always required now
Kevin Paul
committed
Change default IP for all SSHSpawners
Kevin Paul
committed
Always set the port
Kevin Paul
committed
Wrap all env vars in quotes to ensure JSON encoding
Kevin Paul
committed
Need single quote to wrap JSON
Kevin Paul
committed