Don't run upgrade.test with embedded server as it requires mysqlcheck


mysql-test/r/upgrade.result:
  Change database names to start with mysqltest
mysql-test/t/upgrade.test:
  Change database names to start with mysqltest
  Don't run test with embedded server as it requires mysqlcheck
sql/ha_ndbcluster.cc:
  Code style cleanups
  more dbugging
sql/ha_ndbcluster_binlog.cc:
  Free table_share properly in case of errors
  More debugging