NEW_PATCH.md

Adding a new PATCH command

1. Add the new command string to the enum in patch-tenancy-command.json
2. Create a new event class with an accompanying event serializer
3. Update TenancyEventType to add an enum entry
4. Update TenancyTenantCommandType and the static initializer in TenancyCommand.java
5. Update PatchTenancyCommand.getPatchTenancyCommand()
6. Create a new command class for the command
7. Changes entity/vatSettings.java ???
8. Add an event model to service/repositories/MongoDBTenancyRepository
9. change TenancyService.applyCommand()