fix: DefaultResultSetHandler memory waste #3113

[whojes-toss]

java.lang.reflect.Constructor.getParameterTypes method clones objects

public Class<?>[] getParameterTypes() {
     return parameterTypes.clone();
 }

this change will reduce not necessary memory allocations.

[coveralls]

coverage: 87.117% (+0.001%) from 87.116%
when pulling 926c451 on whojes-toss:issue-3113
into b044200 on mybatis:master.

[harawata]

Thank you, @whojes-toss !