[IOT-1911] Make resource/csdk/stack W4 compliant.

[IOT-1911] Make resource/csdk/stack W4 compliant.

These changes include the following:
- Fix W4 warnings under resource/csdk/stack.
- Fix W4 warnings under resource/csdk/stack/test.
- Enable /W4 /WX on resource/csdk/stack.
- Enable /W4 /WX on resource/csdk/stack/test.
- Move disabling warnings from resource/csdk/security
  to build_common/Windows.

Change-Id: Ifed02e4e339093e49b6d174dfe3e3d52469f24ac
Signed-off-by: Alex Kelley <alexke@microsoft.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/17831
Reviewed-by: George Nash <george.nash@intel.com>
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Dave Thaler <dthaler@microsoft.com>