Mongodb part of the Cloud Foundation Fabric

[theshanbhag]

This PR will consist of scripts to add MongoDB as part of Cloud Foundation Fabric

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Checklist

I applicable, I acknowledge that I have:

• [ X] Read the contributing guide
• [ X] Ran terraform fmt on all modified files
• Regenerated the relevant README.md files using tools/tfdoc.py
• [ X] Made sure all relevant tests pass

[ludoo]

Thanks for this. Unfortunately the code does not really conform to our best practices. We can help you put into shape though, let us know how you would prefer to proceed.

[theshanbhag]

Hi Team, we have a call scheduled today with MongoDB team to finalize the deployment details. This is just a placeholder for the issue - #2951 we can merge it post we fix everything.