Inconsistent BaseIOUtils depending on java version

[rmannibucau]

Hi,

since java9/java10 versions were done the BaseIOUtils is inconsistent depending the version of java it runs on cause the buffer size is different.

This task is about reverting and dropping the java specific version to get back a common and shared behavior.

[slachiewicz]

In Java 8/9 i see 16k buffers. Above we use defaults.