EUCA-7826

Setting "None" to be the default value for the inputbox 'Create from snapshot" in the dialog 'Create Volume"

When the value snapshot_id is None, the AJAX call will ignore the id.
EUCA-7826

Setting "None" to be the default value for the inputbox 'Create from snapshot" in the dialog 'Create Volume"

When the value snapshot_id is None, the AJAX call will ignore the id.
Merge branch 'EUCA-7826' of euca-ui:/eucalyptus/eucalyptus-console into EUCA-7826
Merge pull request #188 from eucalyptus/EUCA-7826

EUCA-7826