libvirt-domain: fix dxml passing in virDomainMigrateToURI2
libvirt-domain: fix dxml passing in virDomainMigrateToURI2

The refactoring in commit a26669d silently ignored the dxml
parameter of virDomainMigrateToURI2.

https://bugzilla.redhat.com/show_bug.cgi?id=1295405

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