Fixes bug 524: Memory should me mandatory in wizards
Fixes bug 524: Memory should me mandatory in wizards

Changed memory attribute type into mandatory for KVM and XEN.

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