Take the smaller of MaxRead/max_send_buffer_size and
MaxWrite/max_recv_bufer_size and give that in Fsinfo.
This is workaround for the Tirpc Problem which can't handle
fragments with krb encryption.

Padding 8k when creating tcp transport to avoid fragmentation.

Also change NFS_DEFAULT_RECV/SEND_BUFFER_SIZE to 1M

Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
Signed-off-by: Rong Zeng <rongzeng@us.ibm.com>