Rename getCurrentMetadata to getCollectionDescription and change the return type

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    • Fully Compatible
    • Sharding 2020-02-10, Sharding 2020-02-24, Sharding 2020-03-09
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      As part of the Make Migration Commit Protocol Robust to Network Errors and Failovers Epic, the CollectionShardingState interface will change, and to ease out and track the changes we'll make some assurances to the usage of the interface. The getCurrentMetadata function is used in several parts of the code to check for collection keys format and limits. Renaming the function will help to logically group this usage and separate it from calls that filter information (there is another ticket to rename getOrphansFilter).

      The return type must also fit the intended usage of the function, that is, only information about the sharded key should be accessed from this interface.

            Assignee:
            Tommaso Tocci
            Reporter:
            Marcos José Grillo Ramirez
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