galera.galera_log_bin test created the test tables and executed initial DML into node 2
Then connection is switched to node 1, where ALTER TABLE was attempted. But there is no guarantee that the table to alter was yet replicated to node 1.

The fix in this commit, creates the test tables in node 1 instead, so it is guaranteed that they are available for the later ALTER
Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com>