* Change token allowance method because increaseAllowance does not exist anymore
* Returns collateral when a reservation is deleted and not only a slot is filled
* Remove the returnedCollateral when the slot is not filled by the host
* Add returnedCollateral when the sale is ignored
* Add returnsCollateral variable for ignored state
* Rebase the contracts submodule on the master
* Add integration test
* Fix duration
* Remove unnecessary teardown function
* Remove misleading comment
* Get returned collateral from the request
* Enable logs to debug on CI
* Fix test
* Increase test timeout
* Fix typo
* Fix rebase