Changes to Update workflow scheme

the request property statusMappingsByIssueTypeOverride/items/issueTypeId became optional

the request property statusMappingsByIssueTypeOverride/items/statusMappings became optional

the request property statusMappingsByIssueTypeOverride/items/statusMappings/items/newStatusId became optional

the request property statusMappingsByIssueTypeOverride/items/statusMappings/items/oldStatusId became optional

the request property statusMappingsByWorkflows/items/statusMappings/items/newStatusId became optional

the request property statusMappingsByWorkflows/items/statusMappings/items/oldStatusId became optional

added the non-success response with the status 409

the request property version/id became optional

the request property version/versionNumber became optional