PARTITION

Issue:
------
ALTER TABLE REORGANIZE PARTITION .... can result in
incorrect behavior if any partition other than the last
one misses the "VALUES LESS THAN..." part of the syntax.

Root cause:
-----------
Currently ALTER TABLE with changes to partitions is handled
incorrectly by the parser.

Fix:
----
The if condition which handles partition management
differently for ALTER TABLE in the parser should be removed.
 Change the code to handle the case in the parser.