Merge pull request #438

test(18841): Add tests for the different operations

* test(18841): refactor tests for the operation panel form

* fix(18841): fix types

* test(18841): add tests for system.log

* test(18841): add tests for Delivery.redirectTo

* test(18841): add tests for Mqtt.UserProperties.add

* test(18841): add tests for Serdes.deserialize

* test(18841): add tests for Serdes.serialize

* test(18841): add tests for Metrics.Counter.increment

* test(18841): add tests for Mqtt.disconnect

* test(18841): add tests for Mqtt.drop

* test(18841): add tests for DataHub.transform

Author: vanch3d