Merorize report artifacts into instance variables
To avoid duplicate quieries and calculations.
For https://gitlab.com/gitlab-org/gitlab-ce/issues/43114#note_63873979
Edited by Dmytro Zaporozhets (DZ)
To avoid duplicate quieries and calculations.
For https://gitlab.com/gitlab-org/gitlab-ce/issues/43114#note_63873979