Make some improvements to java +lsp
Make some improvements to java +lsp

This is a first pass at making `+lsp` more functional:

* Fix lsp not starting automatically when opening java-mode buffers.
Placing it in the lsp-java hook does not work.
* Enable the code lens for test classes.
* Add a keybinding/function to easily update the eclipse LSP server.
* Add a keybinding to bring up the lsp-jt-browser (the treemacs based
browser that lists all the project tests).
* Fix root path for lsp-jt.

There are still a lot of rough edges here, and I don't think it's quite
usable yet, mostly due to issues around the java test mode (lsp-jt). The other
functionality all seems to work well though.

hlissner/doom-emacs,hlissner/doom-emacs,hlissner/.emacs.d,UndeadKernel/emacs_doom,hlissner/.emacs.d,hlissner/.emacs.d,hlissner/.emacs.d,hlissner/doom-emacs,UndeadKernel/emacs_doom,hlissner/.emacs.d,hlissner/doom-emacs,UndeadKernel/emacs_doom,hlissner/.emacs.d,hlissner/.emacs.d,UndeadKernel/emacs_doom,hlissner/.emacs.d,hlissner/doom-emacs,hlissner/doom-emacs,hlissner/doom-emacs,UndeadKernel/emacs_doom,UndeadKernel/emacs_doom,UndeadKernel/emacs_doom