add test for retrieving all orders
add test for retrieving all orders
Revert "add test for retrieving all orders"

This reverts commit 5494ddb5601620fa5a9411ba73bb6eae65e32734.
allow order creation
add tests for deleting orders
implement delete for orders
use findById function
add test for order update
implement basic update
add tests to update
add jacoco to project
move db access logic to a dao