created customer object in OrderController instead of using primitives | chethan - Manigandan | f103
fixed the failing test in OrderControllerTest | chethan - mani | f103
merged PlaceOrderController with OrderController and deleted the PlaceOrderController | chethan - mani | f103
merged ViewOrderController with OrderController and deleted ViewOrderController | chethan - mani | f102
resolved merge conflicts | chethan - mani