Create Identity Provider public/private key pair

[geoffturk]

The key pair will be stored in mongo db and will be encrypted/decrypted by the vault. If the key pair is not loaded into the app correctly the app should throw/crash.

See: https://github.com/poetapp/documentation/blob/master/rdd/separate-file-uploads.md

@kennylavender I've assigned this to Kris but please discuss together and reassign as you both see fit.

[krobi64]

We do not need this before we start issuing Identity Claims.

[lautarodragan]

priority tbd @wdavidturner