bug #1130: Use period_to_str in onevm
bug #1130: Use period_to_str in onevm

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