sqldeveloper: update to version 4.1.1.19.59

I also switched the build to depend on openjdk instead of Oracle's proprietary
one. I'm open to suggestions on how to determine the proper value of $JAVA_HOME
in a jdk-agnostic fashion. Right now, I just hard-coded the proper choice for
openjdk.

* pkgs/development/tools/database/sqldeveloper/default.nix: