Injected StockoutReportService into USSD service.
Added UssdMenu model to process and return both the requestID and the
request, changed variables and parameters in framework accordingly
Some USSD Logic + HttpSession functionality
Added singleton key-value store.
USSD Menu Logic & error handling complete
Merge remote-tracking branch 'origin/USSD-branch' into data-rest-api

Conflicts:
	OpenGov/.springBeans