Users with "bypass vapn" permission don't actually bypass

Problem/Motivation

The "bypass vapn" permission was added in ticket #3099467: Added "bypass vapn"-permisson → This removes bypassing roles from the roles to select for giving view access on a node form. However, there is no logic to actually ALLOW those roles to see restricted nodes.

Steps to reproduce

- Create a role without "bypass node access" that has the "bypass vapn" permission
- Edit a node and check a box under the VAPN settings to limit view access of that node to another named role.
- Attempt to view the node with a user who has the bypass vapn permission and get access denied.

Proposed resolution

Add roles with the "bypass vapn" permission to the allowed roles in vapn_node_access(). Patch forthcoming.