[PORT] Add support for SSO to parent and child bot projects for manual testing

[tomlm]

Port this change from botbuilder-dotnet/master branch:
microsoft/botbuilder-dotnet#3489

• Add support for SSO to parent and child bot projects for manual testing
• Fixed a minor bug in oauthprompt

Changed projects

• Skills

[johnataylor]

note parent and child are test projects