Fix is_suse() check for openSUSE distros
Fix is_suse() check for openSUSE distros

We need to do a substring match on the vendor here. As most releases return
"openSUSE project" for the vendor.

Change-Id: Ia05db8d93b5e3f42cb6a9c8d77616ca9f7c32039

openstack-dev/devstack,noironetworks/devstack,group-policy/devstack,openstack-dev/devstack,nawawi/openstack,bigswitch/devstack,dtroyer/devstack,bigswitch/devstack,nawawi/openstack,Mahito/devstack,richliu/devstack,noironetworks/devstack,samgoon/devstack,bswartz/devstack,group-policy/devstack,Mahito/devstack,samgoon/devstack,richliu/devstack,dtroyer/devstack,bswartz/devstack