No Longer Send SIO API Version
No Longer Send SIO API Version

This patch updates the GoScaleIO package to no longer request or send
the API version for outgoing API calls. This is due to a change in the
SIO 2.0.1 Gateway implementation that causes API calls to fail with
"2.0.1" or even "2.0". An issue has been filed with ScaleIO.

akutz/goscaleio,emccode/goscaleio,emccode/goscaleio