aSync change to sync about topic API.

aSync change to sync about topic API.

This patch include,
1. NSAddTopics, NSDeleteTopics are changed to sync call.
2. when NSDeleteTopics function is called,
   It notify consumer that topic is updated.

second patch include,
1. bug fix about double free.
2. bug fix about setTopics.

third patch inlcude,
rename Task Type, Function and struct about topic.

Change-Id: I657775489adc2d316544164ef81752f763143a40
Signed-off-by: jaesick.shin <jaesick.shin@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/12163
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Uze Choi <uzchoi@samsung.com>