Migrate viperserv Vault AppRole to Terraform

Summary:
Currently, the viperserv AppRole is bound to Ysul IP 172.27.27.33.

As we're migrating the eggdrops to WindRiver, the AppRole is now
bound to 172.27.27.35 instead.

Ref T2212

Test Plan:

• Deploy with Terraform (init, plan, apply)
• vault read auth/approle/role/viperserv

Reviewers: dereckson

Reviewed By: dereckson

Maniphest Tasks: T2212

Differential Revision: https://devcentral.nasqueron.org/D3923