Enhancement: Generate JWT token server-side

[chriscallan]

I'd like to be able to interact with the Zephyr API, but maintaining an entire Java build system "just" for generating the JWT token seems a bit heavy-handed. Outside of interacting with Zerphyr, I have zero need for Java, or eclipse/other Java IDE, on my system. So I literally have a vm setup for this and have to fire up hundreds of MB, if not GBs, worth of runtime code to generate what equates to a temporary password.
If this could be generated server-side, it's obviously already geared up for working with the Jave runtime, it would save a lot hassle for folks that want to use Zephyr but don't use Java for anything besides generating this lone token.