During review discussions of JDK-8350596 it was noted that the MaxRAMPercentage bump should only happen when there is a memory limit present. That is, OSContainer::is_containerized() is not sufficient since that returns true when the JVM runs in containers without limits being present.

I suggest we introduce the following (returning boolean):

OSContainer::has_memory_limit()

It implies OSContainer::is_containerized() == true.