Added support for parsing in the SLES patch level correctly

On SLES, the setup module was returning the architecture as the distribution version (i.e. platform.dist() didn't quite return the right thing). This change checks for /etc/SuSE-release and grabs the second column in the third line as distribution_version.
Oops... fixed an error
This change is meant to replace distribution_release, not version!
Merge pull request #5075 from gservat/patch-1

Added support for parsing in the SLES patch level correctly