Server fails to start 95% of the time when started with the -noverify flag

[fbricon]

So the server fails to start 95% of the time when started with the -noverify flag, and rarely succeeds, which smells like a race condition.

After some tracing, I found that, when the server is started the following happens:

• LanguageServer application is accessed on main thread
• it triggers JavaLanguageServerPlugin start(), which starts the JavaClientConnection which spawns some other Thread(s)
• the Initialization handler is called before above start() ends from an LSP Thread, which NPEs on JavaLanguageServerPlugin.getLanguageServer().setParentProcessId(...); because the language server hasn't been set
• JavaLanguageServerPlugin start() has finished, the LanguageServer is set on JavaLanguageServerPlugin the main thread. Too late.