Avoid monitor error on hosts with "Unknown ID" VMs (cherry picked from commit e5f8b745fd10596284ac394fe679b8b12714ac04)
Avoid monitor error on hosts with "Unknown ID" VMs
(cherry picked from commit e5f8b745fd10596284ac394fe679b8b12714ac04)

spirit03/one,spirit03/one,baby-gnu/one,goberle/one,atodorov-storpool/one,hsanjuan/one,atodorov-storpool/one,alvarosimon/one,OpenNebula/one,ohamada/one,OpenNebula/one,hsanjuan/one,hsanjuan/one,atodorov-storpool/one,alvarosimon/one,cloudweavers/one,fasrc/one,fasrc/one,alvarosimon/one,juanmont/one,baby-gnu/one,dberzano/opennebula-torino,atodorov-storpool/one,mattthias/one,goberle/one,unistra/one,atodorov-storpool/one,unistra/one,alvarosimon/one,OpenNebula/one,unistra/one,spirit03/one,baby-gnu/one,ohamada/one,juanmont/one,mattthias/one,hsanjuan/one,atodorov-storpool/one,atodorov-storpool/one,goberle/one,mattthias/one,ggalancs/one,Terradue/one,fasrc/one,Terradue/one,fasrc/one,tuxmea/one,ohamada/one,baby-gnu/one,ohamada/one,fasrc/one,mattthias/one,alvarosimon/one,abelCoronado93/one,dberzano/opennebula-torino,Terradue/one,ggalancs/one,cloudweavers/one,fasrc/one,abelCoronado93/one,tuxmea/one,fasrc/one,ggalancs/one,OpenNebula/one,atodorov-storpool/one,cloudweavers/one,OpenNebula/one,spirit03/one,juanmont/one,abelCoronado93/one,abelCoronado93/one,hsanjuan/one,hsanjuan/one,juanmont/one,mattthias/one,ohamada/one,abelCoronado93/one,abelCoronado93/one,baby-gnu/one,Terradue/one,ggalancs/one,alvarosimon/one,OpenNebula/one,dberzano/opennebula-torino,juanmont/one,spirit03/one,unistra/one,mattthias/one,goberle/one,OpenNebula/one,goberle/one,dberzano/opennebula-torino,ohamada/one,atodorov-storpool/one,tuxmea/one,tuxmea/one,juanmont/one,unistra/one,cloudweavers/one,goberle/one,juanmont/one,tuxmea/one,tuxmea/one,ohamada/one,unistra/one,abelCoronado93/one,baby-gnu/one,cloudweavers/one,hsanjuan/one,cloudweavers/one,tuxmea/one,spirit03/one,dberzano/opennebula-torino,ggalancs/one,ggalancs/one,unistra/one,tuxmea/one,ggalancs/one,abelCoronado93/one,goberle/one,Terradue/one,OpenNebula/one,Terradue/one,dberzano/opennebula-torino,alvarosimon/one,Terradue/one,goberle/one,juanmont/one,juanmont/one,mattthias/one,baby-gnu/one,dberzano/opennebula-torino,OpenNebula/one,fasrc/one,spirit03/one,baby-gnu/one,Terradue/one,ohamada/one,spirit03/one,mattthias/one,hsanjuan/one,cloudweavers/one,unistra/one,ggalancs/one,cloudweavers/one,alvarosimon/one