Update dotnet-install.sh to latest version (#1558)
Update dotnet-install.sh to latest version (#1558)

Fix the test by updating Src/Misc/dotnet-install.sh with content from https://raw.githubusercontent.com/dotnet/cli/master/scripts/obtain/dotnet-install.sh
Microsoft/vsts-agent,Microsoft/vsts-agent,kasubram/vsts-agent,kasubram/vsts-agent,kasubram/vsts-agent,kasubram/vsts-agent,Microsoft/vsts-agent,Microsoft/vsts-agent