Judgment of the Court of 16 May 2017 in Case E-8/16 — Netfonds Holding ASA, Netfonds Bank AS, and Netfonds Livsforsikring AS v The Norwegian Government (Freedom of establishment — Article 31 EEA — Directive 2000/12/EC — Directive 2002/83/EC — Directive 2006/48/EC — Directive 2007/44/EC — Credit institutions — Assurance undertakings — Qualifying holdings — Proportionality — Suitability — Necessity)