Ability to automatically link users/groups to a collection

[markashman]

Currently users have to be manually added to groups and those groups linked to collections.

For large organizations this is time consuming, it would be better if users could automatically be assigned to the relevant collection based on matching an attribute of the collection with an attribute of the user/group.

To take this further, when using SSO the information, such as group could automatically be passed in by the claim and so fully automate the process.