Update site extension testcase to adapt when nework is slow to download package from myget
Update site extension testcase to adapt when nework is slow to download package from myget

badescuga/kudu,chrisrpatterson/kudu,bbauya/kudu,kali786516/kudu,bbauya/kudu,chrisrpatterson/kudu,shrimpy/kudu,kali786516/kudu,shrimpy/kudu,oliver-feng/kudu,YOTOV-LIMITED/kudu,duncansmart/kudu,chrisrpatterson/kudu,puneet-gupta/kudu,EricSten-MSFT/kudu,shibayan/kudu,MavenRain/kudu,dev-enthusiast/kudu,puneet-gupta/kudu,mauricionr/kudu,puneet-gupta/kudu,shibayan/kudu,shibayan/kudu,MavenRain/kudu,badescuga/kudu,sitereactor/kudu,EricSten-MSFT/kudu,kenegozi/kudu,projectkudu/kudu,bbauya/kudu,EricSten-MSFT/kudu,badescuga/kudu,shrimpy/kudu,chrisrpatterson/kudu,kenegozi/kudu,uQr/kudu,YOTOV-LIMITED/kudu,juoni/kudu,sitereactor/kudu,badescuga/kudu,juvchan/kudu,barnyp/kudu,sitereactor/kudu,oliver-feng/kudu,duncansmart/kudu,MavenRain/kudu,EricSten-MSFT/kudu,projectkudu/kudu,kenegozi/kudu,juvchan/kudu,kali786516/kudu,badescuga/kudu,juvchan/kudu,juoni/kudu,dev-enthusiast/kudu,uQr/kudu,puneet-gupta/kudu,YOTOV-LIMITED/kudu,YOTOV-LIMITED/kudu,kenegozi/kudu,bbauya/kudu,mauricionr/kudu,juoni/kudu,barnyp/kudu,shrimpy/kudu,sitereactor/kudu,projectkudu/kudu,juvchan/kudu,duncansmart/kudu,uQr/kudu,mauricionr/kudu,kali786516/kudu,juoni/kudu,projectkudu/kudu,mauricionr/kudu,shibayan/kudu,shibayan/kudu,oliver-feng/kudu,barnyp/kudu,uQr/kudu,EricSten-MSFT/kudu,barnyp/kudu,dev-enthusiast/kudu,duncansmart/kudu,MavenRain/kudu,sitereactor/kudu,juvchan/kudu,puneet-gupta/kudu,projectkudu/kudu,dev-enthusiast/kudu,oliver-feng/kudu