Add check if scram credentials are insync with hash #455
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Pull Request (PR) description
For mongodb >3 the auth mechanism SCRAM-SHA-1 is the new default.
This adds a util and check if the keys computed by password_hash,
salt and iterationCount matches the keys of the existing user.
How SCRAM-SHA-1 works is described here: https://www.mongodb.com/blog/post/improved-password-based-authentication-mongodb-30-scram-explained-part-1
The test I have added is really basic, please let me know if and how this could be improved. Also the scram_credentials parameter is "read-only" which is just done via validate. Looking at other types in the puppet source this is usually how they are dealt with.
This Pull Request (PR) fixes the following issues
Fixes #425