Add tool to check if other requests are still running

This is needed for the Lock.java enhancement where a lock will be implicitly
released if the request owning it dies.

No matter which solution we want for refactoring the Lock itself, we will need this class.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=167600314

java/google/registry/request/RequestModule.java

@@ -29,6 +29,8 @@ import google.registry.request.HttpException.UnsupportedMediaTypeException;
 import google.registry.request.auth.AuthResult;
 import google.registry.request.lock.LockHandler;
 import google.registry.request.lock.LockHandlerPassthrough;
+import google.registry.util.RequestStatusChecker;
+import google.registry.util.RequestStatusCheckerImpl;
 import java.io.IOException;
 import java.util.Map;
 import javax.servlet.http.HttpServletRequest;
@@ -129,6 +131,18 @@ public final class RequestModule {
     return lockHandler;
   }
 
+  @Provides
+  static RequestStatusChecker provideRequestStatusChecker(
+      RequestStatusCheckerImpl requestStatusChecker) {
+    return requestStatusChecker;
+  }
+
+  @Provides
+  @RequestLogId
+  static String provideRequestLogId(RequestStatusChecker requestStatusChecker) {
+    return requestStatusChecker.getLogId();
+  }
+
   @Provides
   @JsonPayload
   @SuppressWarnings("unchecked")