orgs_controller#shibboleth_ds view expects list of Org, not Identifier

[nicolasfranck]

Please complete the following fields as applicable:

Expected behaviour:

Actual behaviour:

• orgs_controller#shibboleth_ds selects a list of Identifier and stores it in @orgs
  (which crashes btw because it cannot sort on name): https://github.com/DMPRoadmap/roadmap/blob/master/app/controllers/orgs_controller.rb#L92

• app/views/orgs/shibboleth_ds.html.erb uses @orgs as if they are organisations ("Select your organisation")

Unused code?

Steps to reproduce:

• checkout version 2.2.0
• logout
• make sure there are Identifier of type Org and scheme shibboleth
• go to /orgs/shibboleth

[briri]

fixed and will be included as part of v3.0.1