encode_exchange_id() uses more stack space than necessary, giving a compile
time warning. Reduce the size of the static buffer for implementation name.
Signed-off-by: NJim Rees <rees@umich.edu>
Reviewed-by: N"Adamson, Dros" <Weston.Adamson@netapp.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>