Updated with Valgrind memory leak fixes for Notification Provider and consumer.

Updated with Valgrind memory leak fixes for Notification Provider and consumer.

Updated NS sample App to allow/deny consumer subscription.

[Philippe Coval]

Ported from 1.2-rel to master, did not change style

  Conflicts:
	service/notification/cpp-wrapper/examples/linux/notificationserviceconsumer.cpp
	service/notification/cpp-wrapper/examples/linux/notificationserviceprovider.cpp
	service/notification/cpp-wrapper/provider/SConscript
	service/notification/cpp-wrapper/unittest/NSConsumerServiceSimulator.h
	service/notification/cpp-wrapper/unittest/NSConsumerServiceTest.cpp
	service/notification/cpp-wrapper/unittest/NSProviderServiceSimulator.h
	service/notification/cpp-wrapper/unittest/NSProviderServiceTest.cpp

Change-Id: I6f3609895cbfe2d4d8b18247b7e7dd4c7a438161
Signed-off-by: abitha.s <abitha.s@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/14369
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Reviewed-by: Phil Coval <philippe.coval@osg.samsung.com>
Author: abitha.s <abitha.s@samsung.com>
Signed-off-by: Phil Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/16887
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Kevin Kane <kkane@microsoft.com>