A query SET @@GLOBAL.binlog_format = ... returns an error when NDB is the
default storage. This fails some tests invoking the set binlog_format explicitly.
because the var turns to be read-only.
  
  In the following are files and method to fix if needed.
  
  t/
  ndb_binlog_basic2.test         # here the failure is benign
  rpl_rbr_to_sbr.test            # does not check any ndb features =>           
 
  .                              # => not_ndb_default is enough
  rpl_row_basic_8partition.test  # set binlog_format can be replaced
  rpl_switch_stm_row_mixed.test  # does not check any ndb features =>
  .                              # => not_ndb_default is enough
  
  two more invoking invoke extra/rpl_truncate_helper.test
  
  rpl_truncate_2myisam           # to be fixed with not_ndb_default
  rpl_truncate_3innodb           # same as above
  .                              # because there is a dedicated to ndb .        
 
  .                              # rpl_truncate_7ndb* suit.

Adapting/testing a new implement
--source include/safe_set_to_maybe_ro_var.inc
to avoid abort due to the error using binlog_format as application.


BitKeeper/etc/ignore:
  Added mysql-test/t/rpl_truncate_4ndb.test to the ignore list
mysql-test/r/rpl_row_basic_8partition.result:
  new results
mysql-test/t/rpl_rbr_to_sbr.test:
  # does not check any ndb features => not_ndb_default is enough
mysql-test/t/rpl_row_basic_8partition.test:
  set binlog_format can be read-only because of e.g default storage ndb.
  adapting/testing a new implement
  --source include/safe_set_to_maybe_ro_var.inc
  to avoid abort due to the error.
  
  Note, that it this particular test we could simply remove SET binlog_format because
  there is have_binlog_format_row require, as the test is about RBR.
  Futhermore utilizing safe_set_to_maybe_ro_var is redundat as well as long as
  we keep non_ndb_default guard.
  The latter is introduced because of ndb partitioning per-key limitation 
  #19259: rpl_ndb_dd_partitions fails on solaris. The page is updated to refer to this
  test's.
mysql-test/t/rpl_switch_stm_row_mixed.test:
  excluding ndb option, no ndb features
mysql-test/t/rpl_truncate_2myisam.test:
  ndb checks truncate separately
mysql-test/t/rpl_truncate_3innodb.test:
  ndb checks truncate separately
mysql-test/include/safe_set_to_maybe_ro_var.inc:
  pseudo-macro to make read-only global/session vars "settable" in sense that
  SET var= val won't produce any error nor aborts testing.