GREG-208: Adding constraint to prevent identity duplicates

See merge request !297

GREG-220: Fixing crash on missing role start date in frontend

See merge request !296

UiO: Sjekk om fødselsnummer/passnummer er i bruk i IGA

See merge request !286

Make type and ou choices required in new role form

See merge request !293

Adding a role without selecting either of these makes no sense, and will
be refused by the backend accordingly.

Displays a warning if the identifier the sponsor wants to verify is
already assigned to someone in the IGA, or if the backend could not
contact the IGA to check.

Queries iga for an external id matching ours. If a match is found, the
name of the owner is returend. Otherwise we return null. Uses the new
iga module to fetch the data.

Makes it possible to search for external ids (nin/passport) in iga
without refering directly to the respective clients.

scim client will be used for fetching iga data for UiB

Fix bug where nin was not saved from feide

See merge request !298

Greg 217 padding margin font

See merge request !294

Add tests of has_mandatory_consents property

See merge request !292

Make logo link to front page

See merge request !291

Sprinkle unicode characters on tests

See merge request !288

Was removed by mistake at some time in the past. Introduced a few tests
to ensure that things work as expected.

Resolves: GREG-223

Adding some endpoints for handling consents belonging to a person

See merge request !287

Verify that the backend accepts unicode for text fields and that it
survives to the database and back again

Fix broken ou hierarchy test

See merge request !289

Switched from caring about the output to only check the number of
results since that's what we really care about

Handle wrong person following invitation link

See merge request !282

GREG-215: Make gender required if field is showing

See merge request !285

Add more tests of hierarchical_access to OUs

See merge request !283

Make email field validate on change again

See merge request !281

GREG-214: Switching to showing orgreg ID in dropdown for units

See merge request !284