Fix CA DTLS handshake retransmission timer

Fix CA DTLS handshake retransmission timer

registerTimer allows only positive integers
which can not be less than RETRANSMISSION_TIME = 1 sec

Change-Id: Ide9344e0eb703564558626a74f754e394288fa1d
Signed-off-by: Dmitriy Zhuravlev <d.zhuravlev@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/8369
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Chul Lee <chuls.lee@samsung.com>
Reviewed-by: Jongsung Lee <js126.lee@samsung.com>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>