Fixed sequences based on comments from Peter Gulutzan and Andrii Nikitin

- Changed names of SEQUENCE table columns to be more close to ANSI
- Fixed error message for SHOW SEQUENCE non_existing_sequence
- Allow syntax CACHE +1
- Fixed ALTER TABLE for TEMPORARY sequences.

mysql-test/suite/sql_sequence/temporary.result

@@ -0,0 +1,12 @@
+#
+# Create
+#
+create temporary sequence s1 engine=innodb;
+alter table s1 engine myisam;
+select nextval(s1);
+nextval(s1)
+1
+select * from s1;
+next_not_cached_value	minimum_value	maximum_value	start_value	increment	cache_size	cycle_option	cycle_count
+1001	1	9223372036854775806	1	1	1000	0	0
+drop temporary sequence s1;