[cinder-csi-plugin] retry mount operation with rescan (#2610)

If the initial formatting and mounting fails in
NodeStageVolume try to rescan the device and retry the
operation.

This prevents failures if the device information is
reported wrongly which would otherwise be blocking
the mounting.

Signed-off-by: NymanRobin <[email protected]>

Author: NymanRobin

pkg/util/blockdevice/blockdevice_linux.go

@@ -128,13 +128,13 @@ func RescanBlockDeviceGeometry(devicePath string, deviceMountPath string, newSiz
 func RescanDevice(devicePath string) error {
 	blockDeviceRescanPath, err := findBlockDeviceRescanPath(devicePath)
 	if err != nil {
-		return fmt.Errorf("Device does not have rescan path %s", devicePath)
+		return fmt.Errorf("Device does not have rescan path " + devicePath)
 	}
 
 	klog.V(3).Infof("Resolved block device path from %q to %q", devicePath, blockDeviceRescanPath)
 	err = triggerRescan(blockDeviceRescanPath)
 	if err != nil {
-		return fmt.Errorf("Error rescanning new block device geometry %s", devicePath)
+		return fmt.Errorf("Error rescanning new block device geometry " + devicePath)
 	}
 	return nil
 }