cleanup-host should not remove kolla-build.conf
cleanup-host should not remove kolla-build.conf

new cleanup-host script removes kolla-build.conf
in /etc/kolla directory which contains the build
configuration for building images.
This should be preserved.

Change-Id: I20fbf3f8a2400a5e048ba55beb0c8e1ec849d8a3
Related-Bug:#1561055

rahulunair/kolla,nihilifer/kolla,dardelean/kolla-ansible,intel-onp/kolla,stackforge/kolla,stackforge/kolla,dardelean/kolla-ansible,mrangana/kolla,GalenMa/kolla,dardelean/kolla-ansible,stackforge/kolla,mandre/kolla,tonyli71/kolla,tonyli71/kolla,intel-onp/kolla,rahulunair/kolla,openstack/kolla,mandre/kolla,coolsvap/kolla,coolsvap/kolla,coolsvap/kolla,mrangana/kolla,mandre/kolla,openstack/kolla,nihilifer/kolla,GalenMa/kolla