Switch from global-redis-check for the example job's service name to
redis-cache. The former name is really confusing and someone finally
called us out on it:
https://groups.google.com/d/msg/nomad-tool/3RTh6CyYkWk/vEe_Sj7lAAAJ
Also specifically mention that the `service.name` parameter is what is
advertised in Consul.
Caught some typos. Made units separate from the numbers 1GHz -> 1 GHz
after talking to Nick about questions of style (this has the side effect of making future spell checking easier).
