SCRD-3484 Gracefully handle missing service description
SCRD-3484 Gracefully handle missing service description

The API to return services from keystone omits the description field 
from each object when the description is missing or empty.  Gracefully
handle the absence of this field.

Change-Id: Iff84e409593ad75ac9cc65574f2f851db3bcab7d

ArdanaCLM/ardana-service,ArdanaCLM/ardana-service