It is difficult to minimize METS for testing

[ross-spencer]

Recording the thought here - but it might be useful to have some way to minimize a METS before recording it as a test fixture. Is it possible to do via mets-reader-writer? Trying to write a test, and trying to optimize the space we use for fixtures is a pain when you're trying to write the actual feature you're interested in. Devs should be motivated to write tests. We have an option to mock responses to serialize the METS for smaller etree objects, but what if the integration level testing is just as important.

I've turned off events in some of the METS I am submitting, but we can do more to remove sections of the PREMIS - in the example I am working on - possibly all the amdSecs if we remove the references in the fileSec.