Objects.equals and Objects.hashcode

Implemented Java 7 generator. Fixed Object[], Serializable[] and
Cloneable[] cases for all implementations.

Change-Id: I1b7258d69f3925b77b2f72f017afc64da7a0cac0
Signed-off-by: Pierre-Yves B. <pyvesdev@gmail.com>
Also-by: Ivan Konstantinov <threesixty@abv.bg>