Improve fault tolerance of dataprotection

[volllly]

When the dataprotection mechanism fails the launcher should be able to recover instead of crashing.

Tasks

• When the client-{cashboxId}.ecdh curve can not be loaded print a warning, regenerate it and redownload the cashbox configuration.
  • If necessary reflect these changes in the DoctorCommand so it does still work.
• If the LauncherConfiguration can not be decrypted (e.g. the proxy string) set the values to null internally and print a Warning suggesting the use of the config set command to add the value to the configuration.

[pawelvds]

1. I am going to extend description/make it clearier after planning/refinement
2. Implement it