engine to the partition_csv test. Also remove test case that was
duplicated. Fix connection procedure with the embedded server.

mysql-test/r/partition.result:
  Update test case result.
mysql-test/r/partition_csv.result:
  Update test case result.
mysql-test/t/partition.test:
  Move test cases to the partition_csv test.
mysql-test/t/partition_csv.test:
  Move tests from partition.test and remove duplicate.
  Tweaky connection procedure to work with embedded.