Files: incorrect auth check for linuxOp

[scblack321]

One of the auth checks in FileUtilsService.linuxOp (around line 255) is incorrect.
Check to see if system owner is making the request compares against oboTenant and not oboUser.

if (client.getSystem().getOwner() != null) isOwner = client.getSystem().getOwner().equals(client.getOboTenant());