DNN-4985 Set FCNMode to Single
Revert "DNN-4985 Set FCNMode to Single"

This reverts commit 801907292517c7811bbb272ef8c422d18f35cebd.
Revert "Revert "DNN-4985 Set FCNMode to Single""

This reverts commit 5a738b35f5ff5eff289fba33400b0bd8635936a7.