Update .travis.yml
Update .travis.yml

1 change docker default login method from https to http
2 run test preparation
reasonerjt/harbor,wy65701436/harbor,reasonerjt/harbor,steven-zou/harbor,wy65701436/harbor,wknet123/harbor,wknet123/harbor,wemeya/harbor,wknet123/harbor,reasonerjt/harbor,wknet123/harbor,wemeya/harbor,reasonerjt/harbor,wy65701436/harbor,wemeya/harbor,steven-zou/harbor,steven-zou/harbor,wemeya/harbor,steven-zou/harbor,steven-zou/harbor,wy65701436/harbor,wknet123/harbor,reasonerjt/harbor,wy65701436/harbor,wemeya/harbor,reasonerjt/harbor,wemeya/harbor,wy65701436/harbor,steven-zou/harbor,wknet123/harbor