Kepler

Maybe generate a new usename or password at runtime and save it under kepler data. Dan will design this.

I've updated org.kepler.util.sql.HSQL to generate a password for the HSQL databases. The password is stored in a text file in the same directory as the database files.

I changed the location of the Kepler cache to .kepler/cache-2.4 and the ports used for HSQL server mode so that these updates are compatible with previous Kepler versions.

I will update https://kepler-project.org/developers/reference/accessing-hsql/ with the new ports and access information.

Original Bugzilla ID was 5279