'Build a dictionary in [name][zone]=disk format.
:param  zone_dict: dict in the format of:
{ items: {key: {api_name:[], key2: api_name:[]}} }
:type   zone_dict: ``dict``
:return:  dict of volumes, organized by name, then zone  Format:
{ \'disk_name\':
{\'zone_name1\': disk_info, \'zone_name2\': disk_info} }
:rtype: ``dict``'

def _build_volume_dict(self, zone_dict):

    name_zone_dict = {}
    for (k, v) in zone_dict.items():
        zone_name = k.replace('zones/', '')
        disks = v.get('disks', [])
        for disk in disks:
            n = disk['name']
            name_zone_dict.setdefault(n, {})
            name_zone_dict[n].update({zone_name: disk})
    return name_zone_dict
