Implement Tests

[solverat]

Q	A
Bug report?	no
Feature request?	yes
BC Break report?	/no
RFC?	no

Open Test-Sections:

• Inheritance (Functional, need to remove controller logic first done)
• ExtJs (Acceptance)
• Restricted Asset Downloads (Acceptance)
• Navigation Tests (Functional)
• Listing Tests (Functional), for each type (especially assets)
• Guard (Unit/Functional)
• OAuth (Unit/Functional)