test_session: improve testClose
test_session: improve testClose

Change-Id: I5fe86b03bb5ff1a1453a69d82d82f6ef2f6e56be

aldebaran/libqi,vbarbaresi/libqi,aldebaran/libqi-java,aldebaran/libqi,aldebaran/libqi-java,aldebaran/libqi,aldebaran/libqi-java,bsautron/libqi