Addressed underlying issues associated with misplaced colon

Upon further investigation, the 'NOVA_DBPASS' reference in the
sentence including the misplaced colon should reside with the database
creation step now located further into this section.  The best
solution probably involves opening another bug to clarify this
section by reordering several steps.  For example, database creation
seems like a prerequisite for configuring the 'connection' key in
nova.conf.  Additionally, at least in the Ubuntu guide, configuring
the keys under [keystone_authtoken] in nova.conf should reside with
the step configuring Compute to use the Identity Service.

In the meantime, unless suggested otherwise, I changed the minimal
number of items to remove the misplaced colon and improve clarity
using the existing sequence of steps.

Change-Id: I5b24d55f236b6b4cf675707ebce34180187b788e
Closes-Bug: #1261607
Merge "Addressed underlying issues associated with misplaced colon"