Support JOB-TOKEN authentication header for generic packages

Support both JOB-TOKEN and basic authentication headers for Generic
packages.

Update `route_authentication_setting[:job_token_allowed]` to support
the following values:
- `true`, `:request`, `[:request]` to authenticate using params or
    `JOB-TOKEN` header
- `:basic_auth`, `[:basic_auth]` to authenticate using Basic
    Authentication header
- `[:request, :basic_auth]` to authenticate using both params or
    `JOB-TOKEN` header, and Basic Authentication header.

Changelog: changed