Avoid throwing and catching ClassNotFoundException for SubList and RandomAccessSubList

[sfc-gh-dschumann]

As these Classes don't exist anymore in newer Java versions, lines 115 and 116 in src/main/java/com/rits/cloning/Cloner.java always cause an exception to be thrown and caught.
As exceptions are less efficient than regular code executions this should be avoided from a performance perspective.
If the maintainers agree I could open a PR with an added java version check at that point in the code.