chore: install ca-certificates in centos base image

due to outdated certificates building the base image did no longer work.
We need to update them manually.

Change-Id: I7410eb7e9816c45aafd4d76970d4b4fc11269f90

share/yashchiki/styles/asic/create_recipe.sh

@@ -75,6 +75,9 @@ From: ${DOCKER_BASE_IMAGE}
     # EPEL is needed for fuse-sshfs and jq
     yum -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
 
+    # certificates of the base image are outdated -> manually install ca-certificates
+    yum install -y ca-certificates
+
     yum -y install \
         apr-util \
         autoconf \