Fix i/o dirs for swift to read from/write to

[ravisantoshgudimetla]

The swift backend for pfioh won't work for end-to-end. This is because the plugins are hardcoded to read from /share/incoming and write to /share/outgoing. As of now, I am adding those hardcodings to swift get data and put data files.

cc @danmcp @rudolphpienaar

[danmcp]

@ravisantoshgudimetla Have you been able to test this?

[ravisantoshgudimetla]

@danmcp Not yet. I am testing it now. Just wanted to get feedback if you are ok with this hardcoding..

[danmcp]

@ravisantoshgudimetla I am ok with it. It was already hardcoded. We should at least hard code the default values.