user change image tag to 20170928
user change image tag to 20170928

due to photon os images 1.0 has bugs.
fallback to 20170928, we shuld change this to 1.0
when the bug fixed.

wy65701436/harbor,reasonerjt/harbor,wy65701436/harbor,wy65701436/harbor,reasonerjt/harbor,steven-zou/harbor,reasonerjt/harbor,steven-zou/harbor,steven-zou/harbor,steven-zou/harbor,reasonerjt/harbor,reasonerjt/harbor,wy65701436/harbor,steven-zou/harbor,wy65701436/harbor,reasonerjt/harbor,steven-zou/harbor,wy65701436/harbor