Remove repeated statement

Change-Id: I24454f63a353f1d08d8d7e0a6999888e35bf266c
Add skelleton files for a new test

Change-Id: I74a6ebe9294582285f3d396fc99dbfa48961dcc7
Implement test to check unrefs of elements from direfferent sessions

Change-Id: I7d943fe86815081d4d1c713a3471fbd777bfe72a