Reingest AIP: Use full normalization node

refs #6488

Because of issues with preconfigured choices and having multiple nodes with
the same purpose, redirect reingest AIP through the normal
preservation-and-access normalization node.
Add `test` client module

This can be used to branch conditionally within microservice chains;
for instance, uncompressed AIP processing has a microservice which
branches the chain based on `test -d %SIPDirectory%%AIPFilename%`.