(#628) Add get-zones to the OVH provider (#666)

Commit 87ad01d added the very useful `get-zones` command, which
requires providers to implement a new method `GetZoneRecords`.
This changes make the OVH provider support this.

integrationTest/providers.json

@@ -125,6 +125,7 @@
     "app-key": "$OVH_APP_KEY",
     "app-secret-key": "$OVH_APP_SECRET_KEY",
     "consumer-key": "$OVH_CONSUMER_KEY",
-    "domain": "$OVH_DOMAIN"
+    "domain": "$OVH_DOMAIN",
+    "knownFailures": "49"
   }
 }