Added sahara-tests package
Added sahara-tests package

openstack-sahara-tests is a Sahara Scenario Test Framework and tempest plugin

Package review: https://bugzilla.redhat.com/show_bug.cgi?id=1318765

Change-Id: I92cee3200cd050d767d1a37aa3c5620867cb525c

redhat-openstack/rdoinfo,javierpena/rdoinfo