Add support for more then one resource parameter

[Revsgaard]

Problem:

• Dictionary<string, string> can only have one item per key.
• QueryHelpers.AddQueryString(string uri, IDictionary<string, string> queryString) support a directory.

Solution:

• QueryHelpers.AddQueryString should support array type parameters dotnet/aspnetcore#7945
• Implemented in 5.0.0-preview4 https://github.com/dotnet/aspnetcore/milestone/98