Added logic for discovering Provider in TCP transport

Added logic for discovering Provider in TCP transport

Before: Consumer tries to discovers provider in UDP transport,
        when connection changed Event is called thru CAUtil.
After: discover provider in TCP transport also for the same event
 - This is independent from initial discovery by service start

# Some compile warnings printed are resolved
# Some string defines for cloud TCP

Change-Id: Ic183ce90aaa1146f6c5910c6040280c370a0d40c
Signed-off-by: KIM JungYong <jyong2.kim@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/9229
Reviewed-by: Uze Choi <uzchoi@samsung.com>
Tested-by: Uze Choi <uzchoi@samsung.com>