Bug#36001: Partitions: spelling and using some error messages

Backport from 6.0

Changed error message to show that it is partitioning
that does not support foreign keys yet.

Changed spelling from British english to American english.

mysql-test/r/partition.result

@@ -1,5 +1,9 @@
 SET @old_general_log= @@global.general_log;
 drop table if exists t1, t2;
+CREATE TABLE t1 (a INT, FOREIGN KEY (a) REFERENCES t0 (a))
+ENGINE=MyISAM
+PARTITION BY HASH (a);
+ERROR HY000: Foreign key clause is not yet supported in conjunction with partitioning
 CREATE TABLE t1 (
 pk INT NOT NULL AUTO_INCREMENT,
 PRIMARY KEY (pk)