[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

[Stevenic]

Needs porting

[cleemullins]

This is all test bot changes. R10.

[stevengum]

Moved to backlog, and unassigned swagatmishra2007 due to other higher priority work. When this issue is picked up for a specific milestone, it should be assigned to someone within the SDK team.