Add the service_state into test_schedule_happy_day.
Add the service_state into test_schedule_happy_day.

Since the fake filter scheduler does not update the capabilities, the sevice
states remains empty. To avoid the None value for free_capacity_gb, we set the
host_manager to a fake host manager with a list of service states.

Fixed Bug 1171906.

Change-Id: I359ea6952392cc5e6b8eff513f3ca4d8161a30e3

alex8866/cinder,eharney/cinder,abusse/cinder,nikesh-mahalka/cinder,phenoxim/cinder,apporc/cinder,rakeshmi/cinder,j-griffith/cinder,rakeshmi/cinder,tlakshman26/cinder-https-changes,takeshineshiro/cinder,potsmaster/cinder,scottdangelo/RemoveVolumeMangerLocks,blueboxgroup/cinder,potsmaster/cinder,julianwang/cinder,redhat-openstack/cinder,dims/cinder,tlakshman26/cinder-https-changes,redhat-openstack/cinder,winndows/cinder,ntt-sic/cinder,rickerc/cinder_audit,scality/cinder,Akrog/cinder,Hybrid-Cloud/cinder,cloudbau/cinder,Thingee/cinder,julianwang/cinder,JioCloud/cinder,petrutlucian94/cinder,j-griffith/cinder,cloudbau/cinder,petrutlucian94/cinder,blueboxgroup/cinder,Hybrid-Cloud/cinder,Datera/cinder,Nexenta/cinder,maelnor/cinder,maelnor/cinder,manojhirway/ExistingImagesOnNFS,inkerra/cinder,NeCTAR-RC/cinder,Datera/cinder,alex8866/cinder,duhzecca/cinder,NetApp/cinder,takeshineshiro/cinder,Accelerite/cinder,leilihh/cinder,dims/cinder,saeki-masaki/cinder,hguemar/cinder,cloudbase/cinder,scality/cinder,ntt-sic/cinder,cloudbase/cinder,Akrog/cinder,NeCTAR-RC/cinder,CloudServer/cinder,rickerc/cinder_audit,leilihh/cinder,JioCloud/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,nexusriot/cinder,github-borat/cinder,sasukeh/cinder,tlakshman26/cinder-new-branch,github-borat/cinder,manojhirway/ExistingImagesOnNFS,ge0rgi/cinder,openstack/cinder,Accelerite/cinder,openstack/cinder,inkerra/cinder,winndows/cinder,Nexenta/cinder,Paul-Ezell/cinder-1,duhzecca/cinder,spring-week-topos/cinder-week,mahak/cinder,Paul-Ezell/cinder-1,scottdangelo/RemoveVolumeMangerLocks,mahak/cinder,bswartz/cinder,spring-week-topos/cinder-week,abusse/cinder,nexusriot/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,CloudServer/cinder,NetApp/cinder,saeki-masaki/cinder,eharney/cinder,hguemar/cinder,sasukeh/cinder,apporc/cinder,tlakshman26/cinder-new-branch,Thingee/cinder,phenoxim/cinder,bswartz/cinder,nikesh-mahalka/cinder,Thingee/cinder