Remove subclassing from uuid-api & database

[kburke]

Remove logic mapping Publication entities into Dataset entities, and support for annotation related to "subclassing". Revise ERD and database generation scripts to remove annotation data related to "subclassing".

[yuanzhou]

@kburke when we test the changes out on DEV during redeployment, do you need to manually update the MySQL uuid database table schema by removing the ENTITY_CLASS_METADATA column and all its data at the same time? If so, we'll need to coordinate and make a backup first.

FYI @maxsibilla I'm a bit concerned when you redeploy uuid-api on SenNet DEV with the config and database updates, you may run into issues with the logging because the SenNet deployment doesn't forward the logs to CloudWatch.

[kburke]

@yuanzhou We do need to coordinate the MySQL changes with migrations. FWIW, it is more for the UPDATE command on existing data than the ALTER command, but I will do them all together. We can make a database backup to follow the correct process, though we are only making a simple value change to about 30 rows of data.