v1.6

Uninstalling vscode extensions (#42)

* Uninstalling vscode extensions

Our java services were not killed because they were eating too much memory, they were killed because the built-in vscode has the redhat.java extension that starts a language server, indexes everything and eating up all the memory.
The code-server --uninstall-extension <id> command only hides the extensions from the vscode UI in edukates, they are still on disk and loaded. Yepp, the language server starts even if I uninstall the extension, that's why removing the extension directories are needed.

* reordering extension folder deletions
it does not mater but this way it is in-sync with uninstall (there the order does matter)