Added openhmis snapshot repository.
Added openhmis snapshot repository.

andrewmoko/openmrs-module-openhmis.cashier,andrewmoko/openmrs-module-openhmis.cashier,k-joseph/openmrs-module-openhmis.cashier,k-joseph/openmrs-module-openhmis.cashier,andrewmoko/openmrs-module-openhmis.cashier,k-joseph/openmrs-module-openhmis.cashier