Edited Unassigned: Hiding controller from showing up on HelpPage does not work when attribute routing is used [1148]

__Scenario__:
User does not like to show up a controller on HelpPage (ex: EntitySetController in OData), so he would like to use setting like [ApiExplorerSettings(IgnoreApi=true)] on the controller.

__Issue__:
When AR is used, [ApiExplorerSettings(IgnoreApi=true)] on the controller is not being honored and HelpPage shows the controller. This is however not a problem when conventional routing is used though.

__Reason__:
With latest checkin related to bug # 1125, when ApiExplorer tries to generate descriptions it goes through different path for AR generated routes than conventional routes.

__Workaround__:
A user could set [ApiExplorerSettings(IgnoreApi=true)] on each individual action which can make the whole controller to not show up.

Attached a standalone katana selfhost repro.
Expected: "api descriptions count: 0"
Actual: "api descriptions count: 1"