Actionize the EPP endpoints.

This introduces Actions and Dagger up until FlowRunner. The changes
to the servlets are relatively simple, but the required changes to
the tests, as well as to auxillary EPP endpoints (such as the http
check api and the load test servlet) were vast. I've added some
comments in critique to make the review easier that don't really
make sense as in-code comments for the future.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=124593546

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

@@ -4,32 +4,24 @@
          xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                              http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
   <!-- Servlets -->
+
+  <!-- Servlet for injected frontend actions -->
   <servlet>
-    <description>
-      This is the primary EPP endpoint for the Registry.  It accepts
-      EPP XHRs from our TLS proxy.
-    </description>
-    <display-name>EPP</display-name>
-    <servlet-name>epp</servlet-name>
-    <servlet-class>google.registry.flows.EppTlsServlet</servlet-class>
+    <display-name>FrontendServlet</display-name>
+    <servlet-name>frontend-servlet</servlet-name>
+    <servlet-class>google.registry.module.frontend.FrontendServlet</servlet-class>
     <load-on-startup>1</load-on-startup>
   </servlet>
+
+  <!-- The primary EPP endpoint for the Registry, which accepts EPP requests from our TLS proxy. -->
   <servlet-mapping>
-    <servlet-name>epp</servlet-name>
+    <servlet-name>frontend-servlet</servlet-name>
     <url-pattern>/_dr/epp</url-pattern>
   </servlet-mapping>
 
-  <servlet>
-    <description>
-      Registrar Console XHR servlet.  Accepts EPP XHRs from GAE GAIA-authenticated frontend sessions.
-    </description>
-    <display-name>Registrar Console XHR</display-name>
-    <servlet-name>registrar-xhr</servlet-name>
-    <servlet-class>google.registry.flows.EppConsoleServlet</servlet-class>
-    <load-on-startup>1</load-on-startup>
-  </servlet>
+  <!-- Registrar Console endpoint, which accepts EPP XHRs from GAE GAIA-authenticated sessions. -->
   <servlet-mapping>
-    <servlet-name>registrar-xhr</servlet-name>
+    <servlet-name>frontend-servlet</servlet-name>
     <url-pattern>/registrar-xhr</url-pattern>
   </servlet-mapping>
 
@@ -44,14 +36,6 @@
     <url-pattern>/registrar-settings</url-pattern>
   </servlet-mapping>
 
-  <!-- Servlet for injected frontend actions -->
-  <servlet>
-    <display-name>FrontendServlet</display-name>
-    <servlet-name>frontend-servlet</servlet-name>
-    <servlet-class>google.registry.module.frontend.FrontendServlet</servlet-class>
-    <load-on-startup>1</load-on-startup>
-  </servlet>
-
   <!-- Registrar Console. -->
   <servlet-mapping>
     <servlet-name>frontend-servlet</servlet-name>
@@ -89,17 +73,8 @@
   </servlet-mapping>
 
   <!-- Public API to do availability checks -->
-  <servlet>
-    <description>
-      Availability Check API.
-    </description>
-    <display-name>Availability Check</display-name>
-    <servlet-name>check</servlet-name>
-    <servlet-class>google.registry.ui.server.api.CheckApiServlet</servlet-class>
-    <load-on-startup>1</load-on-startup>
-  </servlet>
   <servlet-mapping>
-    <servlet-name>check</servlet-name>
+    <servlet-name>frontend-servlet</servlet-name>
     <url-pattern>/check</url-pattern>
   </servlet-mapping>
 

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

@@ -61,17 +61,8 @@
   </servlet-mapping>
 
   <!--  ExecuteEppCommand uses this to execute remotely. -->
-  <servlet>
-    <description>
-      Execute epp from the registry tool.
-    </description>
-    <display-name>Registry tool EPP endpoint</display-name>
-    <servlet-name>epptool</servlet-name>
-    <servlet-class>google.registry.flows.EppToolServlet</servlet-class>
-    <load-on-startup>1</load-on-startup>
-  </servlet>
   <servlet-mapping>
-    <servlet-name>epptool</servlet-name>
+    <servlet-name>tools-servlet</servlet-name>
     <url-pattern>/_dr/epptool</url-pattern>
   </servlet-mapping>