storage: Support deletion of volumes on gluster pools
storage: Support deletion of volumes on gluster pools

Implement the "deleteVol" storage backend function for gluster volumes.

olafhering/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,elmarco/libvirt,zippy2/libvirt,eskultety/libvirt,shugaoye/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,olafhering/libvirt,rlaager/libvirt,agx/libvirt,andreabolognani/libvirt,olafhering/libvirt,nertpinx/libvirt,jfehlig/libvirt,jardasgit/libvirt,jfehlig/libvirt,eskultety/libvirt,libvirt/libvirt,nertpinx/libvirt,elmarco/libvirt,eskultety/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,rlaager/libvirt,rlaager/libvirt,libvirt/libvirt,libvirt/libvirt,crobinso/libvirt,andreabolognani/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,datto/libvirt,andreabolognani/libvirt,agx/libvirt,zippy2/libvirt,taget/libvirt,datto/libvirt,zippy2/libvirt,jardasgit/libvirt,nertpinx/libvirt,shugaoye/libvirt,VenkatDatta/libvirt,agx/libvirt,jfehlig/libvirt,taget/libvirt,zippy2/libvirt,datto/libvirt,crobinso/libvirt,eskultety/libvirt,datto/libvirt,shugaoye/libvirt,rlaager/libvirt,agx/libvirt,taget/libvirt,andreabolognani/libvirt,shugaoye/libvirt,crobinso/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,taget/libvirt,fabianfreyer/libvirt,rlaager/libvirt,elmarco/libvirt,libvirt/libvirt,elmarco/libvirt,VenkatDatta/libvirt,agx/libvirt,nertpinx/libvirt,nertpinx/libvirt,crobinso/libvirt,olafhering/libvirt,elmarco/libvirt,taget/libvirt,datto/libvirt,jardasgit/libvirt,eskultety/libvirt