Set up to configure Saxon with a license for PE/EE if we find such a license, assume at that point that PE/EE has been manually installed.

WIP - not fully tested, UT or manually, and we need manual testing after installing EE to confirm that we can get the features we want.

[fix] Remove licence file stuff, comment code

There is no point in us pushing a licence file into Saxon from a different place, because as soon as we ask Saxon to load a configuration it looks for a licence file.

We will just ask to dump a licence file where Saxon expects it by default.

Comment the methods in the configuration holder.

The saxon-config.xml file we supply does nothing, it just acts as a placeholder for a fully-realised saxon-config.xml when a licensed Saxon edition is installed.

Instructions in markdown for how to achieve this.

Saxon config tests that we find the saxon config file; the part about looking for a license file is not implemented.

De-genericize static names
Don’t capitalize static method
Remove unused imports
Unpick method for complexity metric
Re-order some qualifiers
Make markdown conform to checker rules

We don’t need a map of broker pool to saxon config, I’m not sure why we made it like that in the first place. Broker pool just needs a (lazy) reference to its own saxon configuration (wrapper).