[NetAppFiles] fix default in volumeproperties#15691

lirenhe merged 3 commits intoAzure:mainAzure/azure-rest-api-specs:mainfrom

audunn:ANF-13322-NetAppFiles-2021-06-01-DefaultFixaudunn/azure-rest-api-specs:ANF-13322-NetAppFiles-2021-06-01-DefaultFixCopy head branch name to clipboard