Closed Issue: ODataUriUtils.ConvertToUriLiteral does not support Enum [1608]

ODataUriUtils.ConvertToUriLiteral and ConvertFromUriLiteral do not support Enum

Please fix ```
ConventionsHelpers.GetUriRepresentationForValue
``` after Enum is supported
Comments: Fixed, ODataUriUtils.ConvertFromUriLiteral issue tracked in 1668