Improve Metacat listObject slicing
Story for organizing MN and CN listObject slicing. We have done all we can for the CN given our current architecture (3+ CN responding to requests somewhat randomly).
We should add a synthetic key for Metacat's systemMetadata table and order by that key (not guid). This will ensure consistent slicing for the MN implementation of listObjects since there is only ever a single server in the mix.
Please also see the related bugs that give more background to this story.