Add reason and requestedByRegistrar to domain renew flow (#1378)

* Resolve merge conflict

* Include reason and requestedByRegistrar in URS test file

* Modify test cases for new parameters in renew flow

* Add reason and registrar_request to renew domain command

* Update comments for new params in renew flow

* Make changes based on feedback

core/src/main/resources/google/registry/tools/soy/DomainRenew.soy

@@ -21,6 +21,8 @@
 {@param domainName: string}
 {@param expirationDate: string}
 {@param period: string}
+{@param? reason: string}
+{@param? requestedByRegistrar: string}
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
   <command>
@@ -32,6 +34,18 @@
         <domain:period unit="y">{$period}</domain:period>
       </domain:renew>
     </renew>
+    {if $reason or $requestedByRegistrar}
+      <extension>
+          <metadata:metadata xmlns:metadata="urn:google:params:xml:ns:metadata-1.0">
+            {if $reason}
+              <metadata:reason>{$reason}</metadata:reason>
+            {/if}
+            {if $requestedByRegistrar}
+              <metadata:requestedByRegistrar>{$requestedByRegistrar}</metadata:requestedByRegistrar>
+            {/if}
+          </metadata:metadata>
+      </extension>
+    {/if}
     <clTRID>RegistryTool</clTRID>
   </command>
 </epp>