#582 properly connect hvdc's limUQUp/Down to VRRemote

closes #582

Checklist before requesting a review

use '[x]' to check the checkboxes, or submit the PR and then click the checkboxes

[ ] unit tests and non regression tests were added (update of inputs, outputs, SA, algos)
[ ] main documentation was updated (update of input/output file)
[ ] the corresponding milestone was added in the ticket and in this PR

dynawo / dynaflow-launcher