change asynccall Function to synccall function.

change asynccall Function to synccall function.

this patch include,
1. change sync call about NSProviderSetConsumerTopic Function.
2. change sync call about NSProviderUnsetConsumerTopic Function.

second patch include,
modify invalid return value.

Change-Id: Ia73d6544489dd36f4612c97108ca488f76e038e3
Signed-off-by: jaesick.shin <jaesick.shin@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/13001
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>