Pass bytes to zlib.adler32
Pass bytes to zlib.adler32

adler32, pretty much like anything else that works with raw data,
expects bytes, so adjust the code accordingly.

Signed-off-by: Apollon Oikonomopoulos <ed81ed0a45ccd5c8869bda52e38353a6299ee39e@dmesg.gr>

mbakke/ganeti,ganeti/ganeti,ganeti/ganeti,ganeti/ganeti,mbakke/ganeti,mbakke/ganeti