Display additional phase detail in summary if present
Display additional phase detail in summary if present

Some of the phases, for example 'verify', have an additional
component, for example 'pre-upgrade'. Show that detail in the summary
line generated.

Change-Id: Icfc346bfd0aa432a3c01f70bfc98c7e0b6790c88

openstack-dev/grenade,openstack-dev/grenade