Metacat

share the same dbConnection when inserting and then updating SystemMetadata objects in the backing store.
any errors encountered during the update will rollback the entire transaction and the SM record will not exist, even in part.

Do not loadAllKeys() for SystemMetadataMap when Metacat first starts up. hzIdentifiers will be populated with a simple SQL statement rather than the serial loading of every single SystemMetadata object. It will remain in synch using the usual entryXXX() methods as before....

include pidFilter handling - only matches the complete pid. Issues a warning in the Metacat logs when pidFilter cannot be applied but allows the call to getLogs() to return as though there was no pidFilter given.
https://redmine.dataone.org/issues/2798

use at least one thread on single-processor machines.
https://redmine.dataone.org/issues/2800

Add a few logging statemnts for round trip replication metrics.

add trace statements for measuring time to complete SM generation.

instead of generating SM and ORE maps during dataone configuration/MN registration, moved this all to the replication admin screen where we can target generation for specific nodes. That way it's more controlled as to when and where we generate DataONE required content....

include all EML versions (had been only eml 2.1 for testing)

Append more information such as user name and group to the validating session response.

remove exception from method decl - was not matching the interface def and not compiling.