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
(cherry picked from commit 15444da4d9)

tools/cleanup-host

@@ -38,6 +38,7 @@ FOLDER_PATH="/etc/kolla/"
 for dir in $FOLDER_PATH*; do
     if [ "$dir" == "$FOLDER_PATH""passwords.yml" ] || \
        [ "$dir" == "$FOLDER_PATH""globals.yml" ] || \
+       [ "$dir" == "$FOLDER_PATH""kolla-build.conf" ] || \
        [ "$dir" == "$FOLDER_PATH""config" ]; then
         echo "Skipping:" $dir
     else