fix broken classes

these files are empty:
* linux/network/interface/bond_ovs_dvr.yml is not valid yaml
* glusterfs/cluster.yml is not valid yaml
* linux/network/interface/bond_vlan_dvr.yml is not valid yaml
* jenkins/master/single.yml is not valid yaml

Change-Id: I9c27d6ea41fcad0e14a28097eac7cfe540fb2983
8 files changed