external/wakaama-client: allow passing multiple root CA certs as a bundle
external/wakaama-client: allow passing multiple root CA certs as a bundle

This patch modifies SSL parameters parsing to take certificate
bundles into account. Calling applications can now pass several
CA certificates to be trusted when performing server certificate
verification.

Change-Id: Icb7f3552af1897ad216f83fd3348dd46180346e6
Signed-off-by: Gregory Lemercier <8dfc97fc6edd815cc4739eb8e7c74f3c8222d00f@samsung.com>

JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT