Only support modulo between two Size instances
Only support modulo between two Size instances

The semantics of "5 GiB % 2 GiB = 1 GiB" is quite clear as there
are two 2GiB chunks in 5 GiB leaving a 1GiB chunk left. But
"5 GiB % 2" would just be integer modulo of bytes.

rhinstaller/libbytesize,rhinstaller/libbytesize,rhinstaller/libbytesize