Enable new format Unique Index via FCV

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    • Minor Change
    • Storage Engines 2018-07-30, Storage Engines 2018-08-13
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      New format unique indexes would be initially gated by a variable. Start using FCV to enable or disable new format unique indexes:

      • Plug-in new format indexes into upgrade/downgrade infratructure.
      • Setting FCV=4.2 will cause all exisinting unique indexes to be updated to new format. The content of indexes will not change. New entries will be in new format.
      • With FCV=4.0, existing new format index will remain in this format. Any new unique indexes will be created in old V2 format.
      • Enhance multiVersion test for collectionsPendingDrop.

              Assignee:
              Neha Khatri (Inactive)
              Reporter:
              Neha Khatri (Inactive)
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