[Logic] Duplicated DayOfWeek enum

Logic swagger includes models for both [DayOfWeek](https://github.com/Azure/azure-rest-api-specs/blob/master/arm-logic/2016-06-01/swagger/logic.json#L2261), and [DaysOfWeek](https://github.com/Azure/azure-rest-api-specs/blob/master/arm-logic/2016-06-01/swagger/logic.json#L2057). This produces not as cute code: [Python](https://github.com/Azure/azure-sdk-for-python/blob/master/azure-mgmt-logic/azure/mgmt/logic/models/logic_management_client_enums.py#L121), [C#](https://github.com/Azure/azure-sdk-for-net/tree/AutoRest/src/ResourceManagement/Logic/Microsoft.Azure.Management.Logic/Generated/Models), [Ruby](https://github.com/Azure/azure-sdk-for-ruby/tree/master/management/azure_mgmt_logic/lib/generated/azure_mgmt_logic/models) and [Go](https://github.com/Azure/azure-sdk-for-go/blob/master/arm/logic/models.go#L31) have this problem.