James E. Blair 1dff39fccd Add REPL
As we continue to debug performance, it can be useful to have access
to a REPL as in Zuul.  Since there is no command socket in Nodepool
as there is in Zuul, the REPL must be engaged with a CLI argument
at startup.

Change-Id: Ieece1628494f79f39bd04216fc9ad7b725e541d8
2023-06-22 13:15:27 -07:00
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2023-06-22 13:15:27 -07:00
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