Honor excludehop range when picking tags

[ahelsing]

The excludehop option passes a range of VLAN tags to exclude to the SCS. But the SCS does not restrict the available range based on this request (only which tag it suggests). And stitcher does not honor this exclude separately itself when it goes to pick a tag - it only uses the available range. In particular, if stitcher changes the suggested to 'any', as it does in many cases, the excludehop is completely ignored.

Modify the available range returned by the SCS to exclude tags in excludehops.

[ahelsing]

User error. The proper syntax for excludehop uses an equals sign to separate the URN from the VLAN (range). When you do so, the SCS avoids those VLANS in the VLAN available range, so stitcher can honor that.