Fix code scanning alert - Potential input resource leak

[jordanpadams]

Tracking issue for:

• https://github.com/NASA-PDS/harvest/security/code-scanning/10

[al-niessner]

@jordanpadams

False positive. Either it is always left open or never. Basically the file stream is layered by other streams then the SAX library reads it. Given the SAXSource class/object does not offer close(), going to say it reads the file in completeness correctly closing the input stream every time making this alert a false positive.