Added cases for UseRangeIndexesOnStrings and PerformIndexTransformations in IndexManagement.
Added cases for UseRangeIndexesOnStrings and PerformIndexTransformations in IndexManagement.

Azure/azure-sdk-for-python,Azure/azure-sdk-for-python,Azure/azure-sdk-for-python,Azure/azure-documentdb-python,Azure/azure-sdk-for-python