This patch fixes the following issue which is required for the fix of
the actual issue to work. The actual fix of the bug is committed
separately.

After a Ndb_util_table gets upgraded, the table definition is never
reloaded into the object. Fix that by reopening the table after an
upgrade.

Changes:
storage/ndb/plugin/ndb_util_table.h:
 - Updated the open() method to optionally reload the table definition
   when requested.
 - The create() and upgrade() functions will now also load the table
   from NDB.
 - Refactored the upgrade() function to internally use create().
   Previously, it was not creating the indexes.
 - Updated the functions used by create/upgrade methods to use the
   table from the Ndb_util_object rather than the ones defined during
   table creation.
 - Reformated the Util_table_creator::create_or_upgrade_in_NDB() method.

storage/ndb/plugin/ndb_table_guard.h:
 - Added a new public method reinit() to reload the table from NDB.

storage/ndb/plugin/ndb_sql_metadata_table.h:
 - Updated the define_indexes to reflect the changes made to the base
   class methods.

Change-Id: I6bdcd7b48ca6596a5c008ac66995b1a18faea617