Allow limiting the number of migrations to do at once, both to do migrations that have impact limited to multiple off-peak usage hours to reduce user impact from a migration, and to allow tests that do only a very small number for test purposes. (“Give me a ping, Vasili. One ping only, please.”)
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@martin-brennan can you review and merge if ok?
@johnsonm Looks great, thanks for adding those extra specs and cleaning up the exit codes. Extra points for The Hunt for Red October reference
thanks both of you for the review!