bug #3910: use image DEV_PREFIX for disk attach
bug #3910: use image DEV_PREFIX for disk attach

atodorov-storpool/one,OpenNebula/one,juanmont/one,abelCoronado93/one,baby-gnu/one,unistra/one,baby-gnu/one,OpenNebula/one,OpenNebula/one,abelCoronado93/one,ohamada/one,goberle/one,goberle/one,alvarosimon/one,alvarosimon/one,fasrc/one,baby-gnu/one,atodorov-storpool/one,juanmont/one,hsanjuan/one,goberle/one,hsanjuan/one,atodorov-storpool/one,alvarosimon/one,juanmont/one,juanmont/one,alvarosimon/one,alvarosimon/one,goberle/one,ohamada/one,alvarosimon/one,fasrc/one,ohamada/one,OpenNebula/one,abelCoronado93/one,fasrc/one,hsanjuan/one,juanmont/one,unistra/one,baby-gnu/one,unistra/one,abelCoronado93/one,ohamada/one,fasrc/one,hsanjuan/one,fasrc/one,abelCoronado93/one,ohamada/one,hsanjuan/one,atodorov-storpool/one,atodorov-storpool/one,abelCoronado93/one,alvarosimon/one,juanmont/one,hsanjuan/one,atodorov-storpool/one,OpenNebula/one,ohamada/one,baby-gnu/one,baby-gnu/one,baby-gnu/one,ohamada/one,juanmont/one,abelCoronado93/one,juanmont/one,fasrc/one,unistra/one,baby-gnu/one,hsanjuan/one,alvarosimon/one,unistra/one,goberle/one,atodorov-storpool/one,atodorov-storpool/one,ohamada/one,goberle/one,goberle/one,OpenNebula/one,abelCoronado93/one,unistra/one,hsanjuan/one,atodorov-storpool/one,fasrc/one,OpenNebula/one,juanmont/one,unistra/one,goberle/one,unistra/one,OpenNebula/one,fasrc/one,OpenNebula/one