Thw JSON Web Token provider implementation is going to need keys in
order to issue and validate tokens, very similar to how the fernet
provider operates, but using asymmetric signing instead of symmetric
encryption.
This commit addes a new subcommand to the keystone-manage binary that
creates a ECDSA key pair for creating and validating JWS tokens.
bp json-web-tokens
Change-Id: I9cf5c168bae2a90aba3d696e3f6ce3028998121a
1abe8a2ec0