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/monitoring/whitebox/EppMetrics.java

@@ -15,12 +15,17 @@
 package google.registry.monitoring.whitebox;
 
 import com.google.api.services.bigquery.model.TableFieldSchema;
+import com.google.apphosting.api.ApiProxy;
 import com.google.common.collect.ImmutableList;
 
 import google.registry.bigquery.BigqueryUtils.FieldType;
 import google.registry.model.eppoutput.Result.Code;
+import google.registry.request.RequestScope;
+
+import javax.inject.Inject;
 
 /** The EPP Metrics collector. See {@link Metrics}. */
+@RequestScope
 public class EppMetrics extends Metrics {
 
   static final String EPPMETRICS_TABLE_ID = "eppMetrics";
@@ -37,9 +42,14 @@ public class EppMetrics extends Metrics {
           new TableFieldSchema().setName("eppStatus").setType(FieldType.INTEGER.name()),
           new TableFieldSchema().setName("attempts").setType(FieldType.INTEGER.name()));
 
+  @Inject
   public EppMetrics() {
     setTableId(EPPMETRICS_TABLE_ID);
     fields.put("attempts", 0);
+    fields.put(
+        "requestId",
+        ApiProxy.getCurrentEnvironment().getAttributes()
+            .get("com.google.appengine.runtime.request_log_id").toString());
   }
 
   public void setCommandName(String name) {
@@ -58,10 +68,6 @@ public class EppMetrics extends Metrics {
     fields.put("eppTarget", eppTarget);
   }
 
-  public void setRequestId(String requestId) {
-    fields.put("requestId", requestId);
-  }
-
   public void setEppStatus(Code status) {
     fields.put("eppStatus", String.valueOf(status.code));
   }