Validate volume size is larger than image minDisk

Creating volume from image currently validates that the volume size
must be larger or equal to the image size. If the Image has a minDisk
size configured, the volumen size must also be larger or equal to the
minDisk.

Took the opportunity to clean up the parenthesis in some localized
messages as well.

Change-Id: I0ae99504c1ae7a9c0b7dda5b3307602c48b0a6a8
Closes-bug: 1241253
Merge "Validate volume size is larger than image minDisk"