Remove Thing-manager service which is deprecated.

Remove Thing-manager service which is deprecated.

Functionalities of the current things manager are deprecated because
OCF specification describes oic/con and oic/mnt resources with ambiguousness.
When it comes to be more specific, then a new service for managing those
resource will be developed.

Conflicts:
	service/things-manager/sampleapp/android/con-server/src/com/example/con_server/ConfigurationServer.java
	service/things-manager/sampleapp/linux/configuration/SConscript
	service/things-manager/sampleapp/linux/configuration/bootstrapserver.cpp
	service/things-manager/sampleapp/linux/configuration/con-server.cpp
	service/things-manager/sampleapp/tizen/ConServerApp/src/conserverapp.cpp
	service/things-manager/sampleapp/tizen/TMSampleApp/src/group.cpp
	service/things-manager/unittests/SConscript
	service/things-manager/unittests/ThingsManagerTest.cpp

Change-Id: I00671da74f467461ae6c5ba76d697641dfacdf06
Signed-off-by: Jihun Ha <jihun.ha@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/15191
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: JungYong KIM <jyong2.kim@samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>