install-test-db did not substiture the path to charsets file, so tests failed with non-default collation incompiled, for example --with-collation=latin1_german1_ci
mysqld.cc:
  better error messaging


sql/mysqld.cc:
  better error messaging
mysql-test/install_test_db.sh:
  install-test-db did not substiture the path to charsets file, so tests failed with non-default collation incompiled, for example --with-collation=latin1_german1_ci