Fixed issue with garbage numbers

How to reproduce:
-Start a new multiplayer game wihout joinng it on a second client
-The numbers for local player will now be garbage.

Fix:
-Added reset to local and remote Player info in GameManager::Init(()
Remove unused localPlayerName variable

-Remove the localPlayerName string in GameManager.
- The variable is no longer needed because it is now contained in a PLayerInfo struct.