Custom jwt strategy names

[ekryski]

Summary

Adding support on the client so that you use a custom JWT strategy name. This allows you to support multiple JWT auth strategies on the server side like so:

.configure(jwt({
  name: 'jwt',
  entity: 'user',
  service: 'users'
}))
.configure(jwt({
  name: 'jwt-device',
  entity: 'device',
  service: 'devices'
}));

[corymsmith]

This looks good to me since I know exactly why we need this :)