Problem was that if wsrep_load_data_splitting was used
streaming replication (SR) parameters were set
for MyISAM table. Galera does not currently support SR for
MyISAM.

Fix is to ignore wsrep_load_data_splitting setting (with
warning) if table is not InnoDB table.

This is 10.4-10.5 case of fix.
Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com>