make test work both with and without ndbcluster


mysql-test/r/information_schema.result:
  fix test so that it passes --with-ndbcluster
  
  add conditions to ignore the table_schema='cluster' on some queries as different
  tables are in the cluster database if ndb is running or not.
mysql-test/t/information_schema.test:
  ignore the 'cluster' database as results differ if --with-ndbcluster or without
  
  explictly use schema 'test' for bug7476 check.