qemu: block: Replace snapshot transaction action generator
qemu: block: Replace snapshot transaction action generator

Use the new generator residing in the monitor code rather than directly
using qemuMonitorJSONTransactionAdd.

Signed-off-by: Peter Krempa <2cf5c04c61aa466e4a47bfedc747d17279c72ffc@redhat.com>
Reviewed-by: Eric Blake <a9da18479c871fe903d9590822cfe2629c6a4d11@redhat.com>

libvirt/libvirt,jardasgit/libvirt,andreabolognani/libvirt,zippy2/libvirt,nertpinx/libvirt,jfehlig/libvirt,zippy2/libvirt,crobinso/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,olafhering/libvirt,libvirt/libvirt,zippy2/libvirt,jfehlig/libvirt,jardasgit/libvirt,olafhering/libvirt,andreabolognani/libvirt,nertpinx/libvirt,jardasgit/libvirt,olafhering/libvirt,libvirt/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,crobinso/libvirt,nertpinx/libvirt,crobinso/libvirt,zippy2/libvirt,libvirt/libvirt,andreabolognani/libvirt,nertpinx/libvirt,jardasgit/libvirt,olafhering/libvirt,andreabolognani/libvirt,crobinso/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,jardasgit/libvirt