nexus: 3.14.0-04 -> 3.15.0-01

[zaninime]

Motivation for this change

Update Nexus to the latest available version. I also changed jre to jre_headless, since the graphical part is not needed by the application.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Assured whether relevant documentation is up to date
• Fits CONTRIBUTING.md.

---

// cc @aespinosa @ironpinguin @aflatter @Ma27

[zaninime]

@Ma27 any updates if we can merge this as well? I think it went unnoticed because I submitted the previous one just one day earlier.

[Mic92]

How would I test this?

[nix-shell:~/.cache/nix-review/pr-53927]$ nexus start
mkdir: cannot create directory ‘/nix/store/w73fmg6p49y27dk1nwhjsps7vwbizy9m-nexus-3.15.0-01.’: Read-only file system
mkdir: cannot create directory ‘/nix/store/w73fmg6p49y27dk1nwhjsps7vwbizy9m-nexus-3.15.0-01.’: Read-only file system
Starting nexus

[nix-shell:~/.cache/nix-review/pr-53927]$ nexus status
mkdir: cannot create directory ‘/nix/store/w73fmg6p49y27dk1nwhjsps7vwbizy9m-nexus-3.15.0-01.’: Read-only file system
mkdir: cannot create directory ‘/nix/store/w73fmg6p49y27dk1nwhjsps7vwbizy9m-nexus-3.15.0-01.’: Read-only file system
Picked up _JAVA_OPTIONS: -Dawt.useSystemAAFontSettings=lcd -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel
nexus is stopped.

[Ma27]

There's a basic test at ./nixos/tests/nexus.nix.

[Mic92]

@GrahamcOfBorg test nexus