[dell isilon CSI] Invalid volume size when restoring as new PVC from VolumeSnapshot

Description of problem:
Invalid volume size when restoring as new PVC from VolumeSnapshot. The size unit is undefined and the Size unit appears TiB. Please check the attachment.

1. oc get vs -n syq-test
   NAME READYTOUSE SOURCEPVC RESTORESIZE SNAPSHOTCLASS
   isilon-data1-snapshot-1 true isilon-data1 2219907496 isilon-snapclass-dev01
   isilon-datas-snapshot true isilon-datas 2219907496 isilon-snapclass-dev01
   test1-syq-snapshot true test1-syq 1Ki isilon-snapclass-dev01
   test1-syq-snapshot-11 true test1-syq 1106 isilon-snapclass-dev01

[Env]
dell isilon CSI volumes

• Additional info:
  Issue doesn't happen with ODF