Quick Start Guide updated for RHEL rpms, and CLI syntax

Quick Start Guide updated for RHEL rpms, and CLI syntax

The names of the RHEL rpms have been updated to reflect what is
actually published on openafs.org, and the CLI syntax of the commands
run using -noauth have had the unnecessary -cell options removed.

Reviewed-on: http://gerrit.openafs.org/2914
Reviewed-by: Russ Allbery <rra@stanford.edu>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit 51c761706a9945ab40d34b4212bd463fa617636e)
Change-Id: I164fd4a1c4456ce6e8f7e90402d204cc1d2f84f3
Reviewed-on: http://gerrit.openafs.org/3051
Tested-by: Derrick Brashear <shadow@dementia.org>