Initial work to make the smoketest work on SLES based installs

This pull request contains the minimal change to prepare the smoketest script for running on SLES. More pull request to the individual (openstack) barclamps to enable them for SLES will follow.

This pull request should be merged after: https://github.com/crowbar/crowbar/pull/1923 and https://github.com/crowbar/crowbar/pull/1925