Extends the syntax for the ALTER TABLESPACE statement with the
sub-command RENAME TO, so the general tablespaces can be renamed.

Since this is the first in a seqence of planned extensions to
tablespace syntax, it also includes a complete refactoring of the
parser and executor code for TABLESPACE and LOGFILE group statements.

The behavior of existing statements is intact, with the following exceptions:

 - ENGINE option is unnecessary and deprecated for DROP and ALTER
   TABLESPACE (for CREATE it is still required unless the default SE is
   desired)

 - The following undocumented, unimplemented tablespace-related syntax
   is removed (approved by NDB reviewer):

   ALTER TABLESPACE ... CHANGE DATAFILE ...
   ALTER TABLESPACE ... (READ_ONLY|READ_WRITE|NOT ACCESSIBLE)
   ALTER LOGFILE GROUP ... ADD REDOFILE ...

 - Some error conditions produce a different error since tablepaces now
   must be located in the DD earlier than
   before. E.g. ER_TABLESPACE_MISSING_WITH_NAME rather than
   ER_ILLEGAL_HA_CREATE_OPTION