CDK GSG shouldn't suggest sudo

Section (1.3.3.) Setting Up the xhyve Driver uses instructions with "sudo". This should be changed to the root (#) prompt.

• RHEL doesn't have 'sudoers' set up out of the box, so the instructions wouldn't work on a vanilla installation.
• Because of ^, other DevTools docs use (or should) use just "#" to indicate that a command needs to be run with super-user privileges (leaving the method of gaining such rights to the user).