CreateMETS2: fix SQL for fetching FPCommandOutput

Fixes #6750
Fix manual normalization for access

refs #6753

When a manual normalization access directory is found, a client script
sets the UnitVariable that controls if a DIP is created.  After a
cleanup of MicroServiceChainLinks, this pointed to a non-existent MSCL.
Update to point to new MSCL.
Fix METS namespaces

refs #6676

Fix the AIP METS to only declare the namespaces it's actually using,
notably XSI, xlink, and METS as the default. Replace all 'from
archivematicaXMLNamesSpace import *' with explicit imports and update
references.