[OOM] Add comments for importCustomCerts in blueprints-processor

Comments explain how to enable import Custom Certificates.
By default, importCustomCerts is disabled.

Issue-ID: CCSDK-3356
Signed-off-by: Abdelmuhaimen Seaudi <abdelmuhaimen.seaudi@orange.com>
Change-Id: I42264c465861786dfb38dda8c94abbe6c6a9c56d
1 file changed