JCMA/CCMA Export and Import saved configuration

The spirit of Atlassian's best practices, "don't do it for the first time in Production" does not apply to the Cloud Migration Assistants. This is broken. 

Best practice:

1. Create a clone of the Prod Server/Data Center instance
2. Set up a "Dev" Cloud instance
3. Install *CMA in your Dev Server/DC instance and connect it to the Cloud Dev instance
4. Identify a repeatable method of performing the migration
5. Export the configuration from your Dev *CMA App
6. Import the saved configuration in you Prod *CMA App
7. Perform the migration in Production for real

We need items 5 and 6. This is the ability to save the configuration and migrate it to the Production system after a repeatable method of migration has been determined.