parallels: report, that cdrom image is raw

VIR_STORAGE_FILE_AUTO should be used only in xml provided to
libvirt by user, if I understood correctly. Driver should
set storage source format to specific disk format in
*DomainGetXMLDesc.

CDROMs in PCS use raw image format.
Signed-off-by: NDmitry Guryanov <dguryanov@parallels.com>

src/parallels/parallels_sdk.c

@@ -471,7 +471,7 @@ prlsdkGetDiskInfo(PRL_HANDLE prldisk,
     if (emulatedType == PDT_USE_IMAGE_FILE) {
         virDomainDiskSetType(disk, VIR_STORAGE_TYPE_FILE);
         if (isCdrom)
-            virDomainDiskSetFormat(disk, VIR_STORAGE_FILE_AUTO);
+            virDomainDiskSetFormat(disk, VIR_STORAGE_FILE_RAW);
         else
             virDomainDiskSetFormat(disk, VIR_STORAGE_FILE_PLOOP);
     } else {