Resolve "fix: Retry shortcuts on -1 status code"

Changes in this merge request

• Removed exitLobby call from onFailed in checkLobbyStatus, as it does not make any sense to try exiting the lobby when the server is known to be down.
• Fix shortcitcuiting of the retry mechanism by passing send call to render thread through the use of postRunnable
• Move retry logic from failed method to its own private retry method.
• Tweak timeout, backoff and attempts parameters

Closes #59 (closed)