workflows: workflow representation fix

* Squash me with f84f6853cfb359570e4c51be1beac046a1c6f39a

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
workflows: task names fix

* squash me with 49ee9f7686870180d56f4d273b157db17a866ac4

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>