Source kubernaut-utils.sh in save-token.sh
Source kubernaut-utils.sh in save-token.sh

This commit sources the kubernaut-utils.sh which is required to
run the get-kubernaut function. This fixes running end-to-end
locally.

Fix #551

Co-authored-by: Philip Lombardi <dc0b34b79299edb1c57379afa8b6b6b2f06b5f09@datawire.io>

datawire/ambassador,datawire/ambassador,datawire/ambassador,datawire/ambassador,datawire/ambassador