[ITK] set recursive dicomseries reader

[谢玮宜]

Hi,

I encountered a problem when I tried to read all series at once in a folder
recursively.
			m_nameGenerator-> SetUseSeriesDetails(true);
            m_nameGenerator->SetDirectory(filePath);
			m_nameGenerator->SetRecursive(true);
			m_nameGenerator->AddSeriesRestriction("0008|0021");
			m_nameGenerator->AddSeriesRestriction("0020|0010");

Dicoms in subfoler are not being read..
What is wrong?

BR,xie