CREATE/DROP DATABASE STATEMENT SEGFAULTS IF IDENTIFIER LENGTH IS >=64

The bug is due to the mismatch of schema identifier limits between mysqld and
ndb. mysqld allows 64 whereas ndb allows only 63. The crash happens in NDB's
binlog thread when it tries to replicate the newly created database with schema
length 64 to all other mysqlds present in the cluster.

This patch fixes it by preventing the replication of these 64 length dbs to
other mysqld. This patch also fixes the possible crash that could occur during
ALTER TABLE RENAME with schema identifier of length 64.
Changes :
  - added a validation in ndbcluster_binlog's ndbcluster_log_schema_op() to
    throw an error if length is > 63 and skip logging to ndb_schema table.
  - added a similar validation to ha_ndbcluster::rename_table()
  - updated the error thrown in ha_ndbcluster::create() when table name length
    is greater than 63
  - added appropriate test cases to ndb_basic and ndb_multi to test the patch