Add publish functionality to billing pipeline

This closes the end-to-end billing pipeline, allowing us to share generated detail reports with registrars via Drive and e-mail the invoicing team a link to the generated invoice.

This also factors out the email configs from ICANN reporting into the common 'misc' config, since we'll likely need alert e-mails for future periodic tasks.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=180805972

java/google/registry/config/RegistryConfig.java

@@ -509,27 +509,15 @@ public final class RegistryConfig {
     }
 
     /**
-     * Returns the email address from which we send ICANN reporting email summaries from.
+     * Returns the list of addresses that receive monthly invoicing emails.
      *
-     * @see google.registry.reporting.ReportingEmailUtils
+     * @see google.registry.billing.BillingEmailUtils
      */
     @Provides
-    @Config("icannReportingSenderEmailAddress")
-    public static String provideIcannReportingEmailSenderAddress(
-        @Config("projectId") String projectId, RegistryConfigSettings config) {
-      return String.format(
-          "%s@%s", projectId, config.icannReporting.icannReportingEmailSenderDomain);
-    }
-
-    /**
-     * Returns the email address from which we send ICANN reporting email summaries to.
-     *
-     * @see google.registry.reporting.ReportingEmailUtils
-     */
-    @Provides
-    @Config("icannReportingRecipientEmailAddress")
-    public static String provideIcannReportingEmailRecipientAddress(RegistryConfigSettings config) {
-      return config.icannReporting.icannReportingEmailRecipient;
+    @Config("invoiceEmailRecipients")
+    public static ImmutableList<String> provideInvoiceEmailRecipients(
+        RegistryConfigSettings config) {
+      return ImmutableList.copyOf(config.billing.invoiceEmailRecipients);
     }
 
     /**
@@ -712,6 +700,35 @@ public final class RegistryConfig {
       return Optional.ofNullable(config.misc.sheetExportId);
     }
 
+    /**
+     * Returns the email address we send various alert e-mails to.
+     *
+     * <p>This allows us to easily verify the success or failure of periodic tasks by passively
+     * checking e-mail.
+     *
+     * @see google.registry.reporting.ReportingEmailUtils
+     * @see google.registry.billing.BillingEmailUtils
+     */
+    @Provides
+    @Config("alertRecipientEmailAddress")
+    public static String provideAlertRecipientEmailAddress(RegistryConfigSettings config) {
+      return config.misc.alertRecipientEmailAddress;
+    }
+
+    /**
+     * Returns the email address we send emails from.
+     *
+     * @see google.registry.reporting.ReportingEmailUtils
+     * @see google.registry.billing.BillingEmailUtils
+     */
+
+    @Provides
+    @Config("alertSenderEmailAddress")
+    public static String provideAlertSenderEmailAddress(
+        @Config("projectId") String projectId, RegistryConfigSettings config) {
+      return String.format("%s@%s", projectId, config.misc.alertEmailSenderDomain);
+    }
+
     /**
      * Returns SSH client connection and read timeout.
      *

java/google/registry/config/RegistryConfigSettings.java

@@ -28,6 +28,7 @@ public class RegistryConfigSettings {
   public CloudDns cloudDns;
   public Caching caching;
   public IcannReporting icannReporting;
+  public Billing billing;
   public Rde rde;
   public RegistrarConsole registrarConsole;
   public Monitoring monitoring;
@@ -114,8 +115,11 @@ public class RegistryConfigSettings {
   public static class IcannReporting {
     public String icannTransactionsReportingUploadUrl;
     public String icannActivityReportingUploadUrl;
-    public String icannReportingEmailSenderDomain;
-    public String icannReportingEmailRecipient;
+  }
+
+  /** Configuration for monthly invoices. */
+  public static class Billing {
+    public List<String> invoiceEmailRecipients;
   }
 
   /** Configuration for Registry Data Escrow (RDE). */
@@ -145,6 +149,8 @@ public class RegistryConfigSettings {
   /** Miscellaneous configuration that doesn't quite fit in anywhere else. */
   public static class Misc {
     public String sheetExportId;
+    public String alertRecipientEmailAddress;
+    public String alertEmailSenderDomain;
   }
 
   /** Configuration for Braintree credit card payment processing. */

java/google/registry/config/files/default-config.yaml

@@ -160,11 +160,8 @@ icannReporting:
   # URL we PUT monthly ICANN activity reports to.
   icannActivityReportingUploadUrl: https://ry-api.icann.org/report/registry-functions-activity
 
-  # Domain for the email address we send reporting pipeline summary emails from.
-  icannReportingEmailSenderDomain: appspotmail.com
-
-  # Address we send reporting pipeline summary emails to.
-  icannReportingEmailRecipient: email@example.com
+billing:
+  invoiceEmailRecipients: []
 
 rde:
   # URL prefix of ICANN's server to upload RDE reports to. Nomulus adds /TLD/ID
@@ -215,6 +212,12 @@ misc:
   # to. Leave this null to disable syncing.
   sheetExportId: null
 
+  # Address we send alert summary emails to.
+  alertRecipientEmailAddress: email@example.com
+
+  # Domain for the email address we send alert summary emails from.
+  alertEmailSenderDomain: appspotmail.com
+
 # Braintree is a credit card payment processor that is used on the registrar
 # console to allow registrars to pay their invoices.
 braintree: