Fix import of zone lockdowns

[pdecat]

As mentioned in #134, zone lockdowns imports are failing, and the regression is caused by hashicorp@4bc4aa2#diff-0e4cc11a1763d8ef0318546d3027d928

Sadly, I do not have a test account with the appropriate subscription level to run the acceptance tests:

                * cloudflare_zone_lockdown.zuwfrow271: error creating zone lockdown for zone "myzone.org": error from makeRequest: HTTP status 400: content "{\n  \"result\": null,\n  \"success\": false,\n  \"errors\": [\n    {\n      \"code\": 10012,\n      \"messag
e\": \"zonelockdown.api.not_entitled.max_rules\"\n    }\n  ],\n  \"messages\": []\n}\n"                                                                                                                                                                                  

(and I'd rather not run acceptance tests on production accounts)

[jacobbednarz]

Nice find! 🌟 I have confirmed that this change addresses the issue. Thanks!

[patryk]

Ops! Sorry about that. Just how one missing line can break things. Thanks for the effort.