Zone file import - support missing params.

[hhellyer]

This PR adds support for missing parameters when importing zone files:

• networks
• views
• name

As both zone creation with or without a zone file to prepopulate it use the same call, just with or without the zonefile specificed, the "name" field also added to the api to create a zone and "views" is added to the list of fields passed through on zone creation.