Translate multi-part TLD zone names

Convert periods to hyphens in multi-part TLDs when using them as a zone name
(cloud-dns doesn't allow periods in zone names).

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=172007089

java/google/registry/dns/writer/clouddns/CloudDnsWriter.java

@@ -99,7 +99,7 @@ public class CloudDnsWriter extends BaseDnsWriter {
       Retrier retrier) {
     this.dnsConnection = dnsConnection;
     this.projectId = projectId;
-    this.zoneName = zoneName;
+    this.zoneName = zoneName.replace('.', '-');
     this.defaultATtl = defaultATtl;
     this.defaultNsTtl = defaultNsTtl;
     this.defaultDsTtl = defaultDsTtl;