Create ICANN report upload action

This is the first step in moving the current []cron-Python reporting scripts
into App Engine, as an official part of the Nomulus package. This copies the
structure of RDE uploads, with a few changes specific to monthly reporting.

I've left some TODOs related to actually testing it on the ICANN endpoint, as we're still not sure how files to be uploaded will be staged, and whether we can actually ping their endpoint on valid ports (80 or 443).

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=160408703

java/google/registry/env/common/backend/WEB-INF/web.xml

@@ -57,6 +57,15 @@
     <url-pattern>/_dr/task/brdaCopy</url-pattern>
   </servlet-mapping>
 
+  <!--
+    Monthly ICANN transaction and activity reports. This task uploads the generated
+    report files (in CSV format) via an HTTP PUT to ICANN's endpoint.
+  -->
+  <servlet-mapping>
+    <servlet-name>backend-servlet</servlet-name>
+    <url-pattern>/_dr/task/icannReportingUpload</url-pattern>
+  </servlet-mapping>
+
   <!-- Trademark Clearinghouse -->
 
   <!-- Downloads TMCH DNL data from MarksDB. -->