Create a new variable HOP_DEPENDENCIES_FOLDER (or something equivalent) with a default value of <HOP HOME FOLDER>/lib/jdbc
Use this variable as the value for the <folder> tag in all dependencies.xml files located in /plugins/databases. So this value would be the default. Putting database drivers in lib/jdbc would then work out of the box. Users could use the dependencies folder variable to handle this differently.
Discussion is: better separation of standard jar files and jdbc driver files and easier handling in containers.