Update B2B sample application to fix issues

[Achintha444]

Purpose

To fix the following issues in the B2B sample applicaiton.

• The BaseOrganizationUrl indicates asgardeo dev environment URL which is an internal thing. ( https://localhost:9443/, https://api.asgardeo.io/t/guardio )
• organization_switch grant is not required for a business app.
• Admin app should be management type app (mention to tick the management app tick box).
• No need internal scopes for the business app.
• Error occur when onboarding an IDP.