Comment 2 for bug 1817538

Dig a bit murano code, and still think Murano should fix this.

In murano core library, the "networks" property is actually not passed into heat template. As below:

      - $properties:
          name: $.name
          flavor: $.flavor
          availability_zone: $.availabilityZone
          user_data: $preparedUserData.data
          user_data_format: $preparedUserData.format
          key_name: $.keyname
          metadata: $this.getMetadata($region)