Missing APIs (Role/Groups)

[hexylena]

• add / remove user from role (needs galaxy implementation first)
• add / remove group from role (needs galaxy implementation first)
• undelete role
• undelete group

[nsoranzo]

@erasche We can already add/remove the association of a role to a group with gi.groups.add_group_role() and gi.groups.delete_group_role() respectively.

[nsoranzo]

xref. related #216

[hexylena]

@nsoranzo ah of course. Would it be sensible to add a function for adding/removing the role-group association on the role function so it's clear to other people (or maybe just a note in the documentation on role would be sufficient?) Something like

def add_role_group(role_id, group_id):
  return gi.groups.add_group_role(group_id, role_id)

[nsoranzo]

Sure, gi.roles.add_role_group() makes sense, since we generally speak of association between the 2: https://galaxyproject.org/learn/security-features/