Support region id.

adb/src/model/DescribeTaskInfoRequest.cc

@@ -43,6 +43,15 @@ void DescribeTaskInfoRequest::setAccessKeyId(const std::string &accessKeyId) {
   setParameter(std::string("AccessKeyId"), accessKeyId);
 }
 
+std::string DescribeTaskInfoRequest::getRegionId() const {
+  return regionId_;
+}
+
+void DescribeTaskInfoRequest::setRegionId(const std::string &regionId) {
+  regionId_ = regionId;
+  setParameter(std::string("RegionId"), regionId);
+}
+
 int DescribeTaskInfoRequest::getTaskId() const {
   return taskId_;
 }