calling (rather than defining) non-deterministic SP in SBR (as opposed
to RBR or mixed) will throw an error now.

require mixed mode for tests now. SBR will now fail when calling
non-deter SPs and SFs (as it should), and RBR already failed by virtue of
giving different results for "show binlog" than the results-file has.
also test for 16456 now. lastly make amends because one of the tests
fails with a new error # now as code was added to sql_trigger.cc while
test was disabled.