Log service_status.status instead of service_status
Log service_status.status instead of service_status

Reasons:
- While printing the service status to log instead of printing status
  it prints the object id for service_status object.

Changes:
- Replaces service_status by service_status.status.
- Now it prints the service status to the log.

Change-Id: I98b78eb065bb6a2bce31a9dfcc591423e653dbae
Closes-Bug: #1265141

mmasaki/trove,cp16net/trove,zhujzhuo/openstack-trove,redhat-openstack/trove,cp16net/trove,hplustree/trove,mmasaki/trove,zhujzhuo/openstack-trove,mmasaki/trove,denismakogon/trove-guestagent,hplustree/trove,zhujzhuo/openstack-trove,changsimon/trove,openstack/trove,zhangg/trove,fabian4/trove,changsimon/trove,openstack/trove,denismakogon/trove-guestagent,zhangg/trove,redhat-openstack/trove,fabian4/trove,fabian4/trove,cp16net/trove,changsimon/trove,redhat-openstack/trove