Bug #4122: Fix disk_cost to be MB/hour instead of GB/hour
Bug #4122: Fix disk_cost to be MB/hour instead of GB/hour

(cherry picked from commit 94cb6a5a4b886ded73586779345623725ddabcb4)

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