Incorrect verification source after deleting

[phavekes]

To reproduce

1. Validate using eidas or bank
2. Add a role at an institution
3. Remove the role

The name displayed is as validated by the institution, but the label shows it's validated by eherkenning.

Expected Behaviour:

• If the user has an externaly validated account, and a role is added, the user is asked if he want's to use the new names as validated names for services
• Is the preferred validation is removed, use the names last added validation method for the preferred names.
• Always display the source of the names in the overview's "validated by" field

[Tyskai]

Unfortunately this problem is not fixed. Or even created a new problem (related to 630)

1. Validate using eidas
2. Add a role at an institution, click "no, do not use"

Expected: the information of the user has "eherkenning" and the eIDAS name
Actual behaviour: the information of the user has "example.com" = the institution, while having the eIDAS name

[oharsta]

Added test in 919235e. Moving to to-be-tested

[Tyskai]

I found a bug that still keeps some "instelling data".

Reproduce by:

1. add iDIN
2. then add institute 1 (prefer it)
3. then institute2 (prefer it)
4. delete institue 2
5. delete institue 1
   Expected: only IDIN data is there (and verified)
   Actual behaviour: my institute 1 given name (ins1) seems to be verified by iDIN! In addition to the other data I have from iDIN.

[Tyskai]

Tested again! Now all my test cases seem to work!