[COMMON][CertInit] Uses new tpls for repos / images

This commit makes CertInitializer template to use the new generator for
repositories and images.

Issue-ID: OOM-2364
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: I5efa37225bfe05e2c7be7b8d2420ccaeb10afe62
6 files changed