Reverted back to Java 1.6.
Reverted back to Java 1.6.

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