Parameter improvements and decryption

* Rename parameters and variables to have more meaning
* Handle environment better (Rename to i.e. customertest when needed)
* Remove some unnecessary parameters
* Uniform certificate extraction
* Switch Danske Bank address to use the old address because the new one doesn't work
* Don't check Target Id with Danske Bank because they don't use it
* Decrypt application response with Danske Bank
* Better schema validations in tests
* Check encryption certificate and private key with Danske Bank