Fix static analysis issues in CA layer

Fix static analysis issues in CA layer

Fix issues reported by static analysis tool in
connectivity abstraction layer

Change-Id: I49b10536e65219d5f28ebd5acc0c83ffa833d3da
Signed-off-by: Veeraj Khokale <veeraj.sk@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/21209
Reviewed-by: Sushil Kumar Yadav <sushil.ky@samsung.com>
Reviewed-by: koushik girijala <g.koushik@samsung.com>
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>
(cherry picked from commit 8be7f4f9d8bdd4356318e1a258945b451c09276d)
Reviewed-on: https://gerrit.iotivity.org/gerrit/21507
Reviewed-by: Way Vadhanasin <wayvad@microsoft.com>
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>