Updates for the Developer Portal
Updates for the Developer Portal

Updates so the sample API can be used easily in the Developer Portal. 
-- In schemes, it has to be "http" so that you can test the echo API in the Developer Portal. 
-- In the echoMessage definition, adding type: "object" provides a better user experience in the Developer Portal.
GoogleCloudPlatform/dotnet-docs-samples,GoogleCloudPlatform/dotnet-docs-samples,jsimonweb/csharp-docs-samples,jsimonweb/csharp-docs-samples,jsimonweb/csharp-docs-samples,jsimonweb/csharp-docs-samples,GoogleCloudPlatform/dotnet-docs-samples,GoogleCloudPlatform/dotnet-docs-samples