add test "should generate with single column UNIQUE KEY"

find two bugs
MySQLStatistic(def,madz_database_generator_test,single_column_pk_table,f
alse,madz_database_generator_test,PRIMARY,1,pk_COLUMN,A,0,0,false,true,B
TREE,,), but got
MySQLStatistic(def,madz_database_generator_test,single_column_pk_table,f
alse,madz_database_generator_test,PRIMARY,1,pk_COLUMN,A,0,0,false,false,
BTREE,,) (MySQLDatabaseGeneratorTestSpec.scala:448)

MySQLStatistic(def,madz_database_generator_test,single_column_unique_key
_table,false,madz_database_generator_test,TEST UNIQUE
INDEX,1,unique_key_COLUMN,A,0,0,false,true,BTREE,,), but got
MySQLStatistic(def,madz_database_generator_test,single_column_unique_key
_table,false,madz_database_generator_test,unique_key_COLUMN,1,unique_key
_COLUMN,A,0,0,false,false,BTREE,,)
(MySQLDatabaseGeneratorTestSpec.scala:492)