Fix balance parser exhausting connections

[steven-sheehy]

• Fixes balancer parser exhausting all connections in connection pool by closing in try-with-resources
• Fixes FileWatcher not notified of files created while down #57 by calling onCreate() on startup

[steven-sheehy]

I checked other areas of the code and they either open connection once in constructor and never close or they open and close it between uses, so they're safe. Long term they should be refactored to use try-with-resources.

[gregscullard]

Tested working