Issue 113 - Snakebite unable to parse core-site.xml in EMR

This is to accommodate snakebite to work on EMR cluster. All tests ran successfully. Added to test to see if the config is read correctly on config.py.
To reduce code duplication, consider adding 'fs.default.name' in original if, like this:
```
if property.findall('name')[0].text in ('fs.defaultFS', 'fs.default.name'):
```