Contentdm: METS has namespaces

refs #7239

METS files have fully qualified namespaces, instead of relying on the
default. Update contentdm to search for elements in any namespace.
Ingest: Make DIPs available to be downloaded

refs #7239

Add review link to the move to uploadedDIPs microservice to be able to
review and download DIPs. Consolidate directory browsing endpoint.
CONTENTdm: Project client does not query server

refs #7239

Update MicroServiceChainLinks to not query the CONTENTdm server if the
upload type is project client.
Restructure for CONTENTdm: General cleanup

Move comments to doc strings as appropriate. Simplify duplicate code.
Add comments with questions and ideas.
CONTENTdm: Replace project client functions with one function

Replace simple and compound project client functions with one functon that
pulls all metadata from the METS file, instead of from the server. Use
element names as column headers and element text for the row values. Prefers
non-DC metadata and falls back to DC metadata.  Adds AIP UUID and file UUID
columns to the end of the CSV.

Convert to use lxml for more powerful searching. Clean up, add docstrings,
simplify.