Save and Provision Trust Cert. Chain

Save and Provision Trust Cert. Chain

1. Save TrustCertChain as binary
2. Provision TrustCertChain
3. Add credusae and optionaldata into cred resource

[Patch 1] Upload patch
[Patch 2] Add encodingtype into optionaldata
[Patch 3] Add encodingtype into OC/SRPSVACETrustCertChain API
[Patch 4] Apply review comment

Note: You can verify this patch with https://gerrit.iotivity.org/gerrit/#/c/10597/

Change-Id: I651f3e61bcfc16e2d7355fe6a01833fda4433579
Signed-off-by: js126.lee <js126.lee@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/10595
Reviewed-by: Dmitriy Zhuravlev <d.zhuravlev@samsung.com>
Tested-by: Dmitriy Zhuravlev <d.zhuravlev@samsung.com>