CSHARP-1081: Modify CreateIndexesOperation to use the new createIndexes command when connected to a server that supports it.
CSHARP-1081: Fix minor issue after rebasing on master.
CSHARP-1081: Added tests for CreateIndexesOperation and CreateIndexRequest.
CSHARP-1081: Use a different way of determining whether the collection is the "system.indexes" collection.
CSHARP-1081: Added IndexNameHelper.