No functionality available to revoke a team (N)

[afig]

From an earlier version of M3's Wiki page:

• [ ] Revise function revokeClassDBRole to test isRoleKnown() instead of testing isUser()
• [ ] Add function revokeTeam to addClassDBRolesMgmtCore.sql
  • Similar functionality as revokeStudent except no changing connection limit or statement timeout
  • EDIT: We also have to remove any default privileges that were added (see issue #221).